First things fist, endgame?
It's DLC 2.
You need both DLC's, so get your hands on them.
Make sure you that you have finished the Base Game, DLC 1 and DLC 2 for the first time.

Second things second.
Besides weapons and accessories? Skills, Incarnations and Persona's/Anima's should work with just base game.

Third things third.
LEVELS DO NOT MATTER, NOT IN THE ENDGAME.

#1 GET SP BUFFER SKILLS,
God Robe Warrior is at the end of the SPBUF Skilltree.

#2 Get Violet Flash Incarnation,
You'll get this as a reward for killing all the clamps and the cluster in Sarole Mountains in the East.

#3 Heart-2-Heart stuff,
Persona Bercouli: Born Leader
The character with this one equiped shares their support skills with the entire party.

Persona Eldrie: Prodigy
The character with this one will have their attack speed increased.

Anima Sheyta: Uptight
This just straight up increases your attack in all situations.

A big part of this game is the weapon upgrades, if you want to get anywhere in this game you need upgrade your ♥♥♥♥♥.

Incarnation shards, no matter the size, all sell for 450 shia EACH.

Meaning that if you complete a Mutated Beast Quest LVL 200 and get 99 shards, thats 44550 shia a run. Which IMO would be faster then clearing out an Acient Apostle and getting like 2-3 items that sell for around 4-8k all around.

That and if you talk to the Enigma Broker, you can transfer 10 Medium shards into 100 Small shards. I believe it's the same conversion from Large to Medium.

So if you have 610 Accuracy or higher and good damage, start farming those for shards for cash and upgrades.
Because after the first 5 upgrades, you use Incarnation shards until +99.

Now with the Memory Arena stuff, if you have Forget-Me-Not, you can get it's SP/5* Version for free if you have a 5% discount in North centoria.
So, how do you get that? START GRINDING SIDE QUESTS IN NORTH CENTORIA! Until you get the 5% discount, then once you have FMN at +99...
You can get the 5*/SP version for free, and not have to fight the lvl 999 Kirito in Memory arena for a memory badge to get it.

Now, there is tons of good weapons. See the attached Video for a good "Budget" Build to beat the lvl 300 Mutated Beast Quest stuff.


Also, you may ask "What weapons should I get?" That depends, but Personally a good -[ XT Dragonfan Blade ]- pairs well with FMN.

And I'm really not an authority about what you should get, I'm just an idiot sheitter, so.... Where did I get most of the info I used here?

https://discord.gg/2fw49WeUwU

Yuda's Discord server is a great resource, there's tons of updated information that you can find and you'll be able to ask people questions.

Weather they answer or not is up to them.