This guide is for the end game play. You’d better check my another guide first.
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=1359253078

Unfortunately, in the game, even in the guide book, some descriptions are confusing or even wrong. I will note these when I talk about them.

Before you check this guide, you should better:
a. Clear the game
b. Watch at least one ending and save one “Cleared Game Data”
c. Max your party level
d. Max your Alchemy level
e. Unlock all the recipes (except some recipes for endings)

如果你能看得懂中文，你可以去A9VG论坛的帖子中查看一些资料：
http://bbs.a9vg.com/thread-5291265-1-1.html

Current game version is v1.00 when I start writing this guide.

Updated some stuff of v1.01, which is the same as v1.02 of the game on PS4 and NS

Updated some stuff of v1.02, which is the same as v1.03 of the game on PS4 and NS

Updated some stuff of v1.03, which is the same as v1.04 of the game on PS4 and NS

This is found from a Japanese blog.

You need powerful end game traits, right? But you can’t defeat the two hidden bosses, or even a rare monster.

Never mind, this quest on Notice Board will help you.
-

It needs you to submit a Bursting Gift with effect "Raining Light" and trait "Strong Throw". Synthesize one, then duplicate it.
-

Before you submit the item, save your data. Then submit, check the rewards if they are meet your needs.
-

This quest can give you almost all the end game traits, including all the Ultimate XXX traits.

--Updated v1.01-- Not include Divine XXX and some other new traits come from v1.01

Only few things are affected by quality. Now we prepare something for that "few".

You need 3 quality traits: Super Quality, Pro Perfection, Quality Up ++
Average quality over 476 can become 999 with all the 3 traits.
Average quality over 542 can become 999 with Super Quality and Pro Perfection.
Average quality over 666 can become 999 with Super Quality.
Some Catalyst has a quality bonus. You can add them to the average quality.

How to active the Components effect depends on yourself. With catalyst and agents you can work easily. I recommend Ruby or Philosopher’s Stone as the catalyst. You can make them with Bargain, Mass Produced, Low Price ++ and duplicate them.

When synthesize a 999 quality thing, remember to duplicate it.

Following is the route:

a. Distilled Water: This is the basic. Loop itself until 999 quality.

b. Red Neutralizer and Zettel: Loop them with Distilled Water.

c. Polish: You have Distilled Water and Zettel.

d. Alchemic Clay: You have Polish and Red Neutralizer.

e. Raw Gems: You have Alchemic Clay, Distilled Water, Zettel. If it’s hard, synthesize them as high quality as possible.

f. Gems: You have all the materials of 999 or high quality.

g. Pure Oil and Apcol: You have Jet.

h. Rainbow Neutralizer: You have Alchemic Clay.

i. Blue Neutralizer: You have Pure Oil.

j. Yellow Neutralizer: You have Alchemic Clay.

k. Green Neutralizer: You have Jet.

l. 4 ingots: You have Raw Gems to synthesize Ingot first. Then synthesize other ingots by this.

m. Globe Ball: With Zettel, loop itself until 999 quality.

n. Insect Net: As high quality as possible. This can' be duplicated.

o. Light Insect Net: You have Harmonium. This can' be duplicated.

p. Tanning Fluid: As high quality as possible.

q. Leather: You have Light Insect Net.

r. Ashes of Origin: You have Globe Ball.

s. Purple Neutralizer: You have Tanning Fluid.

t. 4 clothes: You have Jet and Leather to synthesize Cloth. Then synthesize other clothes by this. You also have Light Insect Net and Alchemic Clay.

u. Crimson Stone: You have Ashes of Origin and Alchemy Clay.

v. Philosopher’s Stones: You have all the materials.

There are 4 types of Resonance:
Blade for ATK
Shield for DEF
Art for SPD
ALL for ATK + DEF + SPD

Each type has its own standalone pool. On 3 attackers of FRONT ROW, All the Resonance traits will add the stats to the pool of their own type. And for all the 6 battle members, they can get the stats from the pool if they have at least one Resonance of the pool type.

For example, my front row members have 4*3=12 Resonance ALL: Truth in total, so the pool of type ALL has 60 stat in total. Of course 3 attackers in front row can get the pool of 60 stat. Firis is in my back row. She has only one Resonance ALL: Truth, but she can get the whole pool of 60 stat. For others, it’s inefficient because they get 60 stat from 4 slots. For Firis, it’s so terrific because only one trait provides her 60 stat.

If you change the position of one pair, the pool will re-calculate based on the new front row.

The Resonance traits represent a very nice idea: All for One. Party only needs one or one pair of main attacker, the others only need to support them. Everyone only needs to do his/her own job, so the party can smash every difficult boss.

In addition, after you finish almost all the S Rank quests, a special S Rank quest will appear. It need you submit an N/A bomb with certain effects. Its reward is a 300 quality Crystal Shards with 3 Truth XXX traits. These 3 traits can only be moved to the target accessory, not materials. Among them there is a trait called Truth Memory. This trait is a special Resonance trait. It belongs to the type ALL, and it produces 50 stat.

I recommend to save this rare material now until the next version comes out because higher class of Resonance traits will be added. It’s better to gather them all in one accessory.

Here I only talk about the effect of ATK, DEF, SPD.

4.1. Calculate Buff Result
The enhancement of buff effect is a simple percentage calculation:
(basic stats + special boost) * (1 + buff rate) = current stats

If the buff amount is too small, it will turn to a constant.

These are the special boost in battle:
a. Effect “Fighting Spirit Calm” on Magic Stone Chain.
b. Effect “Fighting Spirit Active” on Magic Stone Chain.
c. Trait “Heightened Soul”.
d. Trait “Soul Dwelling”
e. Trait Resonance series
f. Mathias’ skill “Beast Mode”

Stats of ATK, DEF, SPD have a limit of 999 in battle. But these can break the limit:
a. Effect “Fighting Spirit Calm” on Magic Stone Chain.
b. Effect “Fighting Spirit Active” on Magic Stone Chain.
c. Trait “Heightened Soul”.

Fighting Spirit Calm: Gives you a 25% stats up at the beginning of the battle, and drop to the half each turn.
Fighting Spirit Active: Each turn has a 10% stats up until to the limit of 50.
Heightened Soul: Each turn has a 5% stats up until to the limit of 100.

4.2. Calculate Debuff Result
It’s simple:
basic stat * (1 – debuff rate) = current stats

The debuff amount has a limit of 999. Some battle mix items can break the limit.

4.3. Buff and Debuff Enhancement
Both buff and debuff effect are affected by quality, and affected more sharply in battle mix.
Both buff and debuff effect can be enhanced by traits which increase item power like “Enhance and Increase”. The limit is 25%.
Some special effects have different enhance limit. I will show more detail when I talk about that item.

5.1. Extra Boost All Stats
All stats +10 (including EP)

5.2. Almighty Power (Well Rounded Power)
All stats +15 (including EP)

5.3. Bonds of Belief
Follow-up skills +35%

5.4. Dreadful King
All stats +15(including EP), additional damage +35%

5.5. Star of Expectation
All stats +(lv/3)%

5.6. Awakening Courage
When monster’s lv is higher than you: damage given +10%, damage taken -10%
When fight against boss: damage given +7%, damage taken -7%

5.7. Alchemic Star
Item power +50%, item WT -25%, skills almost -95%

5.8. Top Fashion
WT -15 per target

5.9. Pure Power
Critical hit chance +20%, critical damage bonus +10%

5.10. Dragon Aura
Skills +15%, all stat +10

5.11. Dragon Soul
All stats +(lv/4)%

5.12. Power of Evolution
Combination Gauge +2, all stats +(lv/5)%

5.13. Scarlet Radiance
Skills + 30%, Combination Gauge +5

5.14. Ultimate Evolution
All stats +(lv/2)%

5.15. Ultimate Turn-Around
When monster’s lv is higher than you: damage given +15%, damage taken -15%

--Updated v1.01--

5.16. Truth Memory
ATK, DEF, SPD +50 as Resonance All
Beside the reward from an S Rank quest in v1.00, you can now get this trait on accessories dropped by Nightless Demon Core. (DLC boss) In next version, you can get it from another quest and duplicate it, although you need to buy the new DLC.

Termina and Palmyra can drop all the new traits. Some of them can be gathered in high level map like Domain of Despair.

5.17. Divine Turn-Around
When monster’s lv is higher than you: damage given +30%, damage taken -30%

5.18. Warrior Star
Skills +50%, item power almost -95%.

5.19. Holy Sacrifice
Follow-up skills +50%
You can get this VERY VERY RARE traits from Termina or Palmyra or Nightless Demon Core (DLC)

5.20. Resonance All: Creation
ATK, DEF, SPD +10 as Resonance All
You can get this VERY VERY RARE traits from Termina or Palmyra or Nightless Demon Core (DLC)

6.1. Luft or Eisen Luft with Twin Powers
This bomb can trigger Firis' 4 Follow-up skills as a chain:
Azlight Train - magic and ice type
Ignition Arrow - magic and fire type
Seraph Storm - magic and air type
Corundum Nova - magic type

6.2. Heiter Sturm
With Consume Soul and One Hit Kill to KO monsters.

6.3. N/A for Lowering Resistance
Its second effect can lower all the resistance by 2 levels, but can not remove the resistance.
Quality and traits will not affect this effect.

Its third effect "Slipping Life" does nothing in battle. It's a bug that all the debuff of "increase damage taken" have no effect, including Dark Water and Spirit-driven Ball.

6.4. Breezy Aroma for Buffing ATK
Breezy Aroma's target is all the members including the back row.
You need 999 quality and power up trait to fully enhance the buff effect.

6.5. Pure Aroma
This item is used to create weakness. Ignore the description in Encyclopedia. No matter how high level the resistance is, this effect can easily turn it into weakness.
You can change the fourth effect into different type of weakness to meet your needs.
Quality and traits will not affect this effect.

The new weakness debuff will cover the old one. So you can only get one extra weakness at the same time.

At the same time, I put Negative Risk on it to knockback monsters. This is far more powerful than the normal Stahl Ice Bomb or Lightning Crystal. Its effect can be enhanced by power up traits.

6.6. Acid Fog
This item is used for common DEF debuff. Ensure the second effect is “Defense Down L”.
You need 999 quality and power up trait to fully enhance the debuff effect. But it's hard to get 999 quality in current version.

6.7. Dark Water
This item is used to lower resistance and increase stun levels. If you put the trait "Heal Stun" on it, it will become the most powerful stun item. And the stun effect can be enhanced by power up traits.

6.8. Triton's Trumpet
This item is used to enhance dealt damage when the monster is stunned. Its basic effect is +50% ignoring quality, but it can be enhanced by power up traits up to 100%.

6.9. Star Sprinkler
This item can change the field to "Starlight Plain", whose field effect is "double the skill damage".
I put Positive Risk on it so it can pull my party up to act next. Then the party action order is definetly from right to left.

--Updated v1.01--

6.10. Eisen Luft for Firis's Follow-up
With new traits, you can trigger Firis's all 8 follow-up skills in one chain by this bomb. Actually, any SINGLE TARGET bomb with these three traits can also work.
Only physical damage on single target can trigger her 6th follow-up skill "Chain Quasar". The trait "Eternal Power" can deal physical damage.

6.11. Some Low WT items for Adjusting Action Order
Or you can use these to trigger battle mix.

6.12. Tonic Powder (DLC)
Without battle mix, this is the best ATK buff item, which also can be used by Suelle. (It belongs to the type of Support Item). The disadvantage is it can't work on back row members, and it's a DLC item.
To synthesize a high quality one, you need to farm for the high quality materials from Termina and Palmyra. The Seafood material can be up to 500 quality, the other two can be up to 300 quality. In next version, there is a way to get up to 500 quality Dragon Material.

6.13. Special Elixir Nutrients (DLC)
Used this outside, you can gather better quality items with better traits. No sure if this works on drop items.

7.1. The Video
This is the Firis Follow-up Rush. However this is only a half-way build. I only get about half of the powerful traits by Mineral Oil Marathon, and I only craft weapon and accessories for Suelle, Firis and Alt. But it's enough to beat Palmyra in VH, of course, to get more powerful traits.

Termina has no magic resistance, so for Firis it's much more easier than Palmyra.

Those effects and traits of enhancing damage by percentage are always better than those adding up stats, because stats can be buffed to an incridible number by item or battle mix, while damage enhancement can't.

7.2. The Formation
-
Firis is the main attacker. After getting the buff of Triton's Trumpet, she will change to back row. The member pairing with her must be able to use bombs.
Suelle is the speeder. Speeder needs a SPD build to act the first in the battle, and Suelle is the best member because her basic SPD is the highest.
That's all. Key members are these two. The others are just supporters. Alt and Mathias even do nothing in the battle.

7.3. How to Do in Battle
Start
Pure Aroma to create air type weakness and knockback Palmyra
N/A to lower resistance
Triton's Trumpet to Firis to enhance damage when stunned
Firis change to back row
Star Sprinkler to change the field and pull the party up with a certain order
Breezy Aroma to buff ATK for Firis
Acid Fog to debuff DEF for Palmyra
Luft to trigger 4 follow-up skills of Firis
End

You should notice that:
Pure Aroma has to be used before Acid Fog. (DEF debuff conflict)
Triton's Trumpet has to be used before Breezy Aroma. (ATK buff conflict)

7.4. Cores, Ingots and Clothes
Blason of Divine Power
ATK +15, Critical bonus +15%
The traits "Skillful Attack" and "Persistent Attack" give you 30% additional damage and skill damage ehnhancement.

In current version, there is no powerful sub core. So craft waht you like.
Sub core triat "Increase Aggression" gives you 30% additional damege.
The more powerful trait here is "Dreadful King", which gives you all stats +15 and 35% additional damage. I have not got that.

Orb of Divine Speed
This is for supporters in front row.
SPD +25 and all action WT -30%.
Traits here only needs SPD, or you can put Resonance here.
I don't craft a new one, because it's not important.

Harmonium
This is ATK-SPD version. For Alt, you need fullfill the first effect to get EP version.

Velvetis
This is DEF-SPD version. For Alt, you need fullfill the first effect to get EP version.

7.5. Equipment of Firis
Weapon:
Craft it with ATK-SPD Harmonium *1. Main core is Blason of Divine Power with Skillful Attack and Persistent Attack, sub core is any with Increase Aggression. (better with Dreadful King)

Armor:
Craft it with ATK-SPD Harmonium *2 and DEF-SPD Velvetis *1
I have not craft this Dragoon Mail yet, because I have not got some traits.
You can just craft a stats-up version like me temporarily.
The best 3 traits should be Evolve Body, Resonance All: Truth, Awakening Courage.

Magic Stone Chain
Enhance Follow-up damage and chain bonus.
When the back row member starts a follow-up skill, his/her own chain count also starts. One follow-up, one count, until his/her front member moves again. Chain bonus will enhance follow-up damage according to the chain count.

Third effect must be "Fighting Spirit Calm". It can increase all stat by (25/turn count)% in battle.
In battle, everyone's turn count is standalone. Each time when acts, turn count +1.

Another thing, everyone's turn count starts with 0. The formula will not set 0 as divisor, so the first two turns are both "the first turn". That means, you can get 25% all stats increasement for two turns.

What's more, back row member will not count the turn, so they can always keep the buff, and debuff or bad status.

Lucky Coin
This is really a hidden effect. It's a tradition from A17. This effect belongs to the Time Control Hourglass in A17 ,and Lucky Coin in A18 and A19. On Lucky Coin, you need to max the second effect to get "Bringer of Fortune".

Don't care the introduction of this effect in Encyclopedia. The real effect is damage enhancement, about 35%. What's more, if the damage action has multipule hits, with this effect, the first hit damage enhanced by 35%, the second is 70%, the third is 100%, the forth is 100%......

Traits on accessories:
Ultimate Criticality on both accessories to get a always critical hit (50% *2)
Ultimate Compensation +30% skill damage
Bonds of Belief +35% follow-up damage

8.1. Blizzard Weave: Archous Anima *2
Usually, its not an end game thing. So, you need this fantastic water:
This is first found by a Japanese player.
This is the SPECIAL Distilled Water. It's made with Wandering Globe as the catalyst, so it has a +3 use count effect. And with the trait Multiply and Uses +2, it has a hidden use count of 8 in total. As a result, it will have a hidden 7992 total quality when doing battle mix of Blizzard Weave. This will sharply enhance the DEF debuff effect.

This is the result:
Comparing with Acid Fog's 217 DEF down, this is rediculously great.

8.2. Peaceful Aroma: Archous Anima *10
In battle mix, total quality will enhance buff effect. Breezy Aroma's target is the whole party, including back row. So EX Breezy Aroma will give you whole party an ATK buff。
I will list a buff effect test data in the last.

8.3. King Puni Jelly: Archous Anima *30, Suelle only
EX Puni Jelly provides the most ATK buff in this game, although it only works on single target. Another limit is it only can be used by Suelle, whose battle mix has to be triggered by item dealt damage.
You can get high quality Beehives from Void Flower Fairy in Domain of Despair.
You can get high quality Puniballs from Admiral Puni From Nearby Forest.
You can get high quality Blackberry (Fruits) from Cosmic Shell in The Treasury at the Sea Bottom (First Treasure Vault)

8.4. Rainbow Viel: Archous Anima *60, Lydie only
You need at least Archous Anima *30 to launch Ex Spirit Weave Cloth, but that evasion enhancement effect is not that useful. So I add it to 60 to get the critical chance enhancement effect. With a over 9000 total quality, you can get over 100 point of critical chance up, which will ensure you to always do a critical hit.
You can get high quality Silver Web from Void Flower Fairy in Domain of Despair.

8.5. N/A Type Sigma: Archous Anima *99, Lydie only
It must be a nuke.
Do not max the first effect, it will turn the damage into non-elemental type, which can't hit any weakness or enhanced by the field. You need only "100m Explosion", a fire type damage.
Equipment and traits must be changed. I will write the detail if I build a EX Bomb Rush party after the DLC comes.
My friends made many tests, and found that this traits combination can deal the most damage. Of course, you need to stun the boss first.
In the latest version of PS4 and NS, we made over 900k damage by this nuke.

8.6. Data of ATK Buff Test
Following are the ATK number of Firis in battle:
215 - Normal, no Resonance, no Magic Stone Chain
328 - Breezy Aroma: 999 quality, 11 uses, with Blessing of Strength
374 - Breezy Aroma: 999 quality, 8 uses, with Soul Dwelling first and Blessing of Strength second
447 - Peaceful Aroma (EX Breezy Aroma): 10000 total quality, with Blessing of Strength
509 - Peaceful Aroma (EX Breezy Aroma): 10000 total quality, use other items with Soul Dwelling first and then use this with Blessing of Strength
711 - King Puni Jelly (EX Puni Jelly): 6180 total quality
810 - King Puni Jelly (EX Puni Jelly): 6180 total quality, use other items with Soul Dwelling first and then use this

--Updated v1.01--

8.6. EX N/A v1.01
New traits make this bomb more like a nuke. :D
Twin Powers is fixed. Evil's Bane +60% item power. Peerless Strike +80% damage on stunned target.

Thanks to @SoraKun85 for the nice idea. Items after battle mix will change their uses to 1. This will make traits like Final One useless, and traits like Last strike useful. Following this, I made more tests with my friends and got that:
Total item damage enhancement = Evil's Bane + Peerless Strike.
Yes, not multiplication, it's an addition when both of them have effect. Enhancing item power equals enhancing item damage.

--Updated v1.03--

8.7. Energy Cookie, Archous Anima *30
EX Simple Cookies, another powerful ATK buff item. Single target, better than EX Breezy Aroma with Breath of Strength, but worse than EX Puni Jelly.
However, you need to buy the DLC map "Claudel prairie" to gather super high quality Weiss Wheat with trait Superb Quality, so that you can make high quality (even 999 quality) Wheat Flour and then the 999 quality Simple Cookies with taits Superb Quality, Multyply, Final One.

8.8. Super Dealy Ball (DLC), Archous Anima *80, Suelle only
EX Spirit-diven Ball. Just N/A of Suelle ver.

8.9. Miracle Box (DLC), Archous Anima *60, Suelle only
EX Merry Toy Box, the most powerful DEF debuff item. It can lower Falgior's DEF by 1628 in v1.03, while EX Distilled Water is 1258.
However, it seems the effective limit of DEF debuff number is 999. So EX Distilled Water, EX N/A and EX Merry Toy Box seem to have the same DEF debuff effect on boss.

This is a high end trick. With some special buff, you can deal huge damage in one shot.

About the stun status, you should know something:
a. Everyone in battle, including our party members, has a max stun value. When the total stun damage gets over that max value, the monsters, or you, are stunned.
b. The stun progress is shown by the yellow circle around your or monsters' avatar on the time line.
c. When stunned, the unit can't do anything.
d. When stunned, all the damage taken will ALWAYS BE CRITICAL.
e. Stunned status will soon get recovered by any damage or healing actions (one full action, not one hit) on the target, or just by the time.
f. Recovery from stunned status will double max stun value in this battle.
g. Everyone has a slow stun recovery as every unit's action goes on. Its speed affects how fast you recover from stunned status.
h. Almost All the damage except normal attack can deal stun damage. Some effects can also deal stun damage like "Add Stun L". Some effects and traits and buff can enhance your dealt stun damage like "Hammer of Justice ". Some effects may enhance your damage when the target is stunned like "Ruthless Blow".

So it's easy to conclude that, buff your main attacker first, then stun the monster, at last deal huge damage to end the battle.

Since all the damage taken will be always critical when the target is stunned, you can easily get the critical bonus and save some trait slots for some more aggresive ones.

10.1. The Video
-
Alchemist is dangous. They can ruin the world.
Total a 720k damage. Palmyra has magic type resistance and a hidden passive damage barrier. So damage on her may reduce to 400k~500k.
Alt and Mathias are not important in this rush.

10.2. The Formation
Lydie is in the front row at beginning to get the buff. Then she will change to back row.

10.3. How to Do in Battle
Start
Pure Aroma to create fire type weakness and knockback Termina
Triton's Trumpet to Lydie to enhance damage when the target is stunned
Stun Termina
Change Lydie to the back row
Use Anfelite to change the field
The trait "Frozen Delicacy" on Anfelite can trigger Lydie's battle mix by her front member
N/A Type Sigma with 99 Archeus Anima
End

10.4. Suelle's Equipment
-
I still build Suelle as a speeder. With new traits from v1.01, I can save some slots for Resonance for main attacker (This bomb rush doesn't need Resonance).

Weapon is not the one has most ATK, since I need SPD and this one has 10 more SPD.
Craft it with two ATK-SPD Harmonium.
Main core is Orb of Divine Speed. Sub core is Lion's Might from DLC. If you don't have DLC, change sub core to any you like.

Armor is craftef by two ATK-SPD Harmonium and one DEF-SPD Velvetis

If you don't have Truth Memory, change it to Resonance All: Heaven.
Time Control Hourglass is from DLC. If you don't have DLC, change it to Windspirit Talisman.

You need at least 800 SPD to act faster than lv200 Palmyra or Termina in VH, by chance. And over 980 SPD can ensure you act faster than them. If SPD of your Suelle's build is not enough, then you need:
Change her traits on weapon to Resonance All: Creation, Almighty Power, Dreadful King.
Change her traits on Magic Stone Chain to the same as mine on Time Control Hourglass.

10.5. Supporter's Equipment
I take Sophie as an example.
-
Craft weapon and armor with ATK-SPD Harmonium or DEF-SPD Velvetis.
Main core is Orb of Divine Speed, sub core is any. Lion's Might from DLC is better.
Put as many Resonance All as possible. Of course Truth Memory is better.
You can still choose Windspirit Talisman if you don't have DLC.

10.6. Lydie's Equipment
-
Put as many traits that enhance bomb damage or critical bonus or damage against higher level enemy. Then fill the rest slots by EP traits.

Craft weapon with three EP Harmonium.
Main core is Sphere of Wisdom. Sub core is Lion's Might. If you don't have DLC, change main core to Blason of Divine Power, and change sub core to any you like.

Craft Armor with wo EP Harmonium and one EP Velvetis.
ATK doesn't affet item power, so change Magic Stone Chain to Knuckle Guard. It can enhance the damage when hit the weakness and when target is stunned.

10.7. Pure Aroma with Fire Type Weakness
Just change its fourth effect to Weak to Fire.

10.8. Dark Water for Stunning
-
Termina and Palmyra's max stun value is 525. This Dark Water with Heal Stun can deal 550 stun damage in total. Its stun damage can be enhanced by those traits which increase item power like Final One.

10.9. Anfelite
Change the field into "The Great Cascades of Anfel" which can enhance fire type damage by 20%.

11.1. The Video
-
This is the most powerful combination in this game. Its damage is physical type, so it works well on Palmyra.
Combination is a special "skill" of FRONT MEMBER. So in my rush, I only need to build Mathias. Alt is not important, but I've built him for a higher damage. I will show his build in next chapter.

11.2. The Formation
-

11.3. How to Do in Battle
Start
Knockback Palmyra
Change Suelle to back row
Battle mix by Lydie, Linking Chain to charge combination gauge
Alt uses Oath of Glass on himself to buff EP
Triton's Trumpet to Alt to enhance stun damage
Change Alt to back row and Mathias to front row
Triton's Trumpet to Mathias to enhance damage when target is stunned
N/A lower Palmyra's all resistance and trigger battle mix by Suelle
Battle mix by Suelle, Peaceful Aroma for ATK buff for all party members
Change field, and trigger battle mix by Lydie
Battle mix by Lydie, EX Distilled Water for DEF debuff
Dark Water to deal stun damage
Mathias attack Palmyra by skill, trigger Alt's follow-up and just stun her, then active the combination
End

11.4. Mathias' Equipment
-
Craft his THIRD sword, not the last one, with three ATK-SPD Harmonium
Main core is Blason od Divine Power. Sub core is Lion's Might. If you don't have DLC, change sub core to any you like.

Armor is crafted with two ATK-SPD Harmonium and one DEF-SPD Velvetis.

Combination is not follow-up skill, so I change the traits to those enhance skill damage. These traits enhance all the skills including MP skills in battle, follow-up skills and combination.
White-hot Headband from DLC also has the effect "Fighting Spirit Calm". Beside this, its second effect "Inner Fire" can enhance damage by 15% when the monsters have higher level. If you don't have DLC, change it to Icedream Talisman.

12.1. The Video
-
I have to cut Alt's damage, or the boss can't afford only the first follow-up skill "Dwarf Star's Ferocity" of over 300k damage. So I didn't use EX Distilled Water or EX Spirit Weave Cloth or Triton's Trumpet.
Mathias is not important in this rush.

12.2. The Formation
-

12.3. How to Do in Battle
Start
Pure Aroma to knockback the boss
Dark Water to deal stun damage (adjust stun value of boss)
N/A to deal stun damage (adjust stun value of boss)
Alt uses Oath of Glass to buff EP for himself
Change Alt to back row
Change field and trigger battle mix by Lydie
Battle mix by Lydie, Peaceful Aroma to buff ATK for all party members
Adjust stun value of boss by items and meteor of field effect
Sophie uses an all-target skill and break the boss, to trigger Alt's four follow-up skills.
End

12.4. Alt's Equipment
-
Craft weapon with two EP Harmonium.
Main core is Blason of Divine Power. Sub core is Lion's Might. If you don't have DLC, change sub core to any you like.

Armor is crafted with two EP Harmonium and one EP Velvetis

The boss Nightless Demon Core is only lv85, with effect of Soul Dwelling is lv95, still lower than lv100. So I remove Divine Turn-Around and Awakening Courage.

Alt is special. EP can apparently enhance his skill damage which marked by "damage proportionate to the Equipment Effect", while other members can't. So I put Divine Strength (+50EP) on his armor and two accessories.

This is a free update in v1.02.

Rare item merchants sell the greatest things you really want. Their goods are all of high quality and with many valuable traits. Each of them have some “Lucky Find” goods slots. These slots will refresh about every 30 days. Goods in these slots are random (within each merchant’s own range). Also, quality and traits of these goods are random. Quality limit of most goods is 500, of some is 300 like beehive.

There are 4 merchants in total. I’m sure you can meet them in my listed time range, but I don’t know if these range can be larger. I’ll update if I get more accurate data.

Castle Plaza -> Atelier Borthayre -> shop “Atelier Petitail”
Appear around 6:00~10:00
RECOMMENDED. Beehive, Dunkelheit, Golden Puni Balls

The Royal Castle -> Entrance Hall -> shop “Waschbar”
Appear around 10:00~14:00

Soleil Street -> Smithy -> shop “Golden Pickaxe”
Appear around 16:00~20:00

Sea-view Hill -> Church of Vegne -> shop “The Flow of Love”
Appear around 22:00~6:00

If you go to the place a little earlier, the merchant will appear but doesn’t sell anything. You have to meet them in correct time range, so you can find their dots on mini map turn to blue. Then they become the real “shop”.

This DLC painting has many new materials and monsters, including one boss.

You can gather some new materials, or farm monsters to get them. But all the categories they belong to can be synthesized, so their quality is not important. You can also get much more end game traits on these materials, even including Holy Sacrifice. So, if you have the DLC nutrients, just use it each time you enter an area before you gather materials.

This is a high-level map. All the monsters are over lv90, so it’s better to put Consume Soul before One Hit Kill.

The third map of this painting is a school area. Each time you enter this painting, you can fight the boss Sephira Netzach once in the sports ground. Winning the fight, and three gather points of yellow orbs will appear in this area. You could think these are the drop items of this boss. Divine XXX or Ultimate XXX can be easily found. These orbs will be refreshed when you change area.

I've found Resonance All: Truth and Heaven, but I'm not sure if Creation will appear, since I've gathered the yellow orbs for about 100 times and didn't find it.

The boss fight is very difficult. I’ll introduce something in another chapter.

15.1. The Video

15.2. The Formation
Lydie is main speeder, Sophie is sub speeder. Alt needs over 500 SPD to act earlier than the boss.

15.3. How To Do in Battle
Begin
Pure Aroma to create fire weakness, Negative Risk to knockback.
Blessing of Strength on Pure Aroma to trigger Lucia's battle mix.
Battle mix by Lucia, EX Distilled Water for DEF debuff.
N/A to lower all resistance by 2 levels, N/A's damage triggers Suelle's battle mix.
Battle mix by Suelle, EX Breezy Aroma for ATK buff.
Eisen Luft with Twin Powers, Twin Powers: Pair, Eternal Power to trigger all 8 Firis's follow-up.
End

15.4. About This Boss
This boss has some annoying passive skills and counter skills. I will introduce some of its features:
a. High damage resistance when it is not stunned.
b. High knockback resistance.
c. High stunned gauge, but recover much slower when stunned.
d. Each time using items, it will counter with a skill pulling itself up a little on time line. When the item's target is the whole party, the pulling up amount will sharply increased.
e. And this skill will give him a buff that cutting his damage taken to 1 twice.
f. Any Field effect will be removed by him soon after you use the field change item.

So, you have three ways to fight him.
Smash him before he can move like it in this video.
Mathias' skill Beast Mode plus Testament Oath to stun him
Firis's 8 follow-up to stun him. You need equipment or traits to enhance her dealt stun damage.

15.5. Firis’s Equipment
Weapon and Armor are standard things of main attacker.

When fight this boss, you have a small chance to miss your attack, so I put Cunning Wit to enhance accuracy. It can also enhance critical damage bonus. I have no time to stun the boss or us EX Spirit Weave Cloth to enhance critical chance, so I put Ultimate Criticality *2 to get an always critical hit. Holy Scrifice is the most powerful trait to enhance follow-up skills.

You need to buy the DLC "New Area - Claudel Prairie". It contains a new map and some quests.
Go to Notice Board, press "X" button to change page, you will see the DLC quest. Find this one:
-

Submit 20 Red Sand over 100 quality. Gather them in the new map Claudel Prairie, or farm punis in another DLC map Ventus Mines.
-

Check your reward. Save & Load until you get Truth Memory. Duplicate it.

17.1. The Video
I want to shoe Ilmeria's follow-up together with this combination, so I set Firis in front row. Actually, set Firis in back row and activating this combination after her 8 follow-up chain will get more damage. To get more total damage, I somehow build Ilmeria's equipment, while her build is not important.

17.2. The Formation
Suelle is speeder to act first.

17.3. How to Do
begin
a. Sulle uses any all-party-member-target item with Positive Risk to pull all members up, and with any stat buff trait to trigger Lucia's battle mix.
b. Lucia's battle mix, EX Distilled Water for DEF debuff.
c. Sulle uses Triton's Trumpet on Firis, trigger Lucia's battle mix.
d. Lucia's battle mix, EX Breezy Aroma for ATK buff.
e. Firis uses Dark Water to deal stun damage.
f. Sophie uses Star Sprinkler to change field, with trait Positive Risk to pull all members up, and with trait Frozen Delicacy to trigger Lydie's battle mix.
g. Lydie's battle mix, Linking Chain to charge combination gauge.
h. Sulle uses another Dark Water to deal stun damage.
i. Firis uses skill Lil's Damper to trigger Ilmeria's 3 follow-up, and then activate the combination.
end

17.4. About This Boss
a. Over 510k hp
b. Completely resist knockback, and counter when knockbacked.
c. Very high max stun value, about 2000. Recovery quickly when stunned.
d. Counter with Damage skills when get phisical or thunder type damage.
e. Counter with No-damage skills when get fire type damage.

17.5. Firis' build
Almost the same combination build as Mathias&Alt. Change Magic Stone Chain to Knuckle Guard, it can be more powerful in this fight, because Falgior has weakness of fire, and the combination is of fire type.

17.6. Dark Water
After many tests, I finally got these two Dark Water. They help me control Falgior's stunned timing.

18.1. The Video
Well, Lydie has nuke, while Suelle has err...... meteor ??!! So we need to thank the sisters not ruining the world?

18.2. The Formation
Active members are Lydie, Suelle, Lucia, Sophie. Lydie and Lucia are both main speeder. They both need to act faster than Falgior, but who acts first is not important.

18.3. How to Do
begin
a. Pure Aroma to create ice type weakness
b. Any all-party-member-target item with Positive Risk to pull party members up
c. Triton's Trumpet on Suelle
d. Change Suelle to back row
e. Anfelite to change field, and pull all party members up
f. Dark Water to deal stun damage
g. Dark Water with effect Cause Misfortune to deal stun damage and trigger Suelle's battle mix at same time
h. Suelle's battle mix, Super Deadly Ball (EX Spirit-driven Ball)
end

18.4. Suelle's Build
Almost the same thing as Lydie's N/A build.

A new chapter of Battle Mix will be added soon. (some high quality gathering materials are hard to get)
Updated at 2018-04-14: Has been added.

Maybe I will add a chapter of fully built party when v1.01 comes.
Updated at 2018-04-20: Has been added.

I will update this guide when the game updates to a new version (if I think it's necessary) to get new traits and smash new boss.

If you or I find something new, I will also update this guide.

If you have any questions, feel free to ask me, both English and Chinese are OK.