Legend:
Old name/Remastered name
[input in duel] [WP/SP cost] [Damage potency]
<<< Effect (if any) >>>
(Tips for challenging arts, or the ones I usually had trouble with) (sparks from/spark difficulty)

Arranged as they come in-game.

HA stands for HybridArts, which they are.
To clarify: spark works for me if it procc'd within about 10 to 15 minutes. YMMV.
I did not include Bighorn or Blue skellies from Ruins of Han'Nova as a source for sparks, since if you need the guide you are probably not really ready to face them.
Just in case you can spark about 3/4 of all weapon arts and most spells (incl. Song of Earth) during first visit of RoHN, but it will not be fast or easy.

For Spell Sparks anima is listed after the character who can learn it, you don't need to spam anima, one use is enough; however I highly recommend to limit anima usage to the one you want to learn.

Since this is important and might be confusing; I edited it a bit for clarity, but: some spells CANNOT be sparked during duels. You just need to use anima (like in party combat) and hope that end screen will bring you the "Wil learned Song of Earth!" message; a.k.a post-battle spark.
This can happen in both duel and party battle modes.

This was more of a simple notes I made while playing the game oh-so-long ago, with information taken from SaGa wiki and, of course, arcanelore and a lot of other places. Kudos to them.

Special: Counter: negates damage, counterattacks opponent.

Karate Punch
[Prepare- Punch] [2] [9]

Backhand
[Feint - Punch] [3] [15]
unavoidable

Rotation Kick
[Charge - Kick] [3] [21]

Bear Paw/Bear Claw
[Charge - Grab] [4] [24]

Brawl
[Punch - Kick - Punch] [4] [27]

Ogre Run/Ogre Rush
[-] [4] [32]
party-only spark/use, Line AoE
(Bear Paw/21, Rotation Kick/22)

Crush Beat/Fists of Fury
[Charge - Punch - Punch] [4] [35]
bonus damage vs Rock

Heart Breaker
[Focus - Grab - Punch] [5] [38]
can inflict Cripple

Arm Hammer
[Charge - Charge - Punch] [5] [45]
can miss

Kick Rush
[Kick - Kick - Kick] [5] [49]

Corkscrew
[Charge - Focus - Punch] [6] [51]

Somersault
[Charge - Kick - Kick] [5] [54]

Triangle Kick
[Feint - Kick - Kick] [6] [57]
unavoidable

Sumo Throw
[Punch - Grab - Kick] [8] [60]
can inflict Cripple

Kitchen Sink
[Charge - Feint - Kick] [7] [62]
can inflict Morale Down

Rolling Thunder
[Focus - Punch - Punch - Punch] [9] [64]

Tumbler
[Feint - Grab - Charge - Grab] [9] [72]
can inflict Cripple
(Sumo Throw/39, Arm Hammer/41)

Cascade Rising/Flash Flood
[Focus - Kick - Kick - Kick] [10] [79]
(Somersault/41)

Dragon Revolution/Triple Dragon
[Feint - Grab - Kick - Punch] [10] [85]
Party-only spark
(Triangle Kick/45, Kitchen Sink/45, Arm Hammer/46, Ogre Run/47)

KAMIKAZE/Rising Sun
[Charge - Charge - Charge - Grab] [10] [90] [1]
1 LP/use
(Ogre Run/45, Crush Beat/49)

Eradication
[Punch - Punch - Kick - Kick] [10] [99]
can deathblow
(Heart Breaker/49, Corkscrew/50)

Notes:
All but listed below can be sparked off Megalith Beast with relative ease.
Revolution can be sparked off Horn Buffalo/Armor Bugs in VogCanyon, not recommend to, however. Bighorn is sadly the way with Queen Pegs solid second.
Kamikaze and Eradication can be sparked off Ant Commanders(duel, yes, both)/Queen Pegs.

Special: Deflect, negates damage.

Double Slash/Double Vertical (?)
[Cleave - Cleave] [2] [21]

Cross Slash/Cross Cut (???)
[Slash - Backslash] [3] [25]
bonus damage vs Undead

Strike Slash
[Feint - Slash] [3] [27]
can inflict Stun

Running Slash
[Feint - Backslash] [3] [33]

Smash
[Charge - Cleave] [4] [37]
can miss

Mist Double/Artful Slash (??)
[Feint - Cleave - Slash] [3] [34]

Final Letter/Eulogy (...)
[Backslash - Cleave - Backslash] [6] [39]
can deathblow

Dead End
[Cleave - Backslash - Slash] [7] [42]
can deathblow
(Strike Slash/25, Smash/30)

Double Stroke
[Prepare- Backslash - Backslash] [4] [44]

Cross Break
[Charge - Cleave - Cleave] [5] [46]

Slice & Dice
[Slash - Backslash - Cleave] [5] [49]

Dragon(/'s) Tail
[Feint - Slash - Backslash] [5] [50]

Head Cracker/Vertical Smash
[Prepare- Charge - Slash] [6] [52]
bonus damage vs Insects

Heaven & Hell/Heaven and Earth (...)
[Charge - Slash - Backslash] [6] [55]
can inflict Stun

Head Wind/Headwind Rush
[Feint - Cleave - Backslash] [7] [59]
(Running Slash/33, Mist Double/36 Cross Break/39)

Bull Crush
[Charge - Charge - Cleave] [8] [63]
can miss

Aftervision/Mirage Blade (??)
[-] [7] [55]
party-only spark/use, hits all enemies
(Mist Double/34, Strike Slash/36)

No Moment/No Rhythm (...)
[Prepare- Prepare- Prepare- Slash] [8] [66]
unavoidable

Blade Spray/Thousand Blades
[Prepare- Charge - Charge - Backslash] [9] [71]
fan AoE
(Running Slash/48)

Bear Crush/Ursine Assault (...)
[Charge - Charge - Charge - Cleave] [10] [80]
can miss

Multi-Way/Doppelgangers (why???)
[Slash - Backslash - Cleave - Slash] [13] [88]
(Cross Break/50, Head Wind/55, Slice And Dice/57)

/HA/

Thunder Blade
[Water - Backslash - Cleave] [6] [50]

Tornado Blade/Tornado Slash (?)
[-] [7] [74]
unsparkable, learnt via Johan, target AoE

Gale Blade/Gale slash (?)
[Tree - Cleave - Cleave - Slash] [10] [94]

Notes:
All but Multiway can be sparked off Buffalo/Armor Bugs in VogCanyon.
Multiway can be sparked off Ant Commanders (duel) or Queen Pegs.

Special: Looks cool


Tomahawk
[Charge - Throw] [2] [17]

Heel Crush/Maim
[Focus - Backslash] [2] [19]
can inflict Quick Down

Hyper Hammer
[Charge - Slash] [3] [24]

Wood Cutter/Cut timber (??)
[Charge - Charge - Slash] [4] [27]
bonus damage vs Plants

Fake Out/Time Lapse
[Feint - Backslash - Slash] [3] [34]
unavoidable

Skull Crush/Head Splitter
[Focus - Charge - Slash] [4] [40]
bonus damage vs Skeletons, can inflict Psyche Down

Axel Turn/A.Spin
[Prepare - Charge - Backslash] [5] [44]

Ogre Crossing/Night Crossing
[Prepare - Backslash - Backslash] [4] [49]
(Axel Turn/30, Fake Out/31, Hyper Hammer/33, Heel Crush/33)

Sky Drive
[Charge - Feint - Throw] [5] [53]

Megahit
[Prepare - Charge - Slash] [6] [60]
can miss

Yo-Yo
[Focus - Charge - Throw - Throw] [7] [55]

Wheel Grind/Wheel Strike (?)
[Feint - Slash - Slash - Slash] [5] [61]
(Axel Turn/37, Wood Cutter/38, Ogre Crossing/39)

Flash Trinity/Reverse Delta (???)
[Prepare - Slash - Slash - Backslash] [8] [70]
(Megahit/41, Fake Out/43, Axel Turn/43)

Sky Rendezvous
[Throw - Throw - Focus - Throw] [9] [73]
(Sky Drive/40)

Tornado Divide
[Backslash - Backslash - Charge - Slash] [12] [91]
bonus damage vs Plants, can miss
(Wood Cutter/50, Megahit/50)

/HA/

Fire Wheel
[Flame - Charge - Throw] [5] [45]

All can be sparked off Buffalo/Armor Bugs in VogCanyon.

Special: Windmill, negates damage, TimelyAction! :)

Swing & Stab
[Backslash - Thrust] [2] [18]

Double Thrust
[Thrust - Thrust] [2] [22]

Lawnmower/Grasshopper
[Backslash - Backslash] [4] [27]
bonus damage vs Plants, can inflict stun

Rush/Charge
[Chrage - Thrust] [3] [32]

Skewer
[Charge - Charge - Thrust] [4] [36]

Wave Thrust/Tsunami Strike (whats with all the strikes??)
[Backslash - Thrust - Thrust] [5] [43]

Wide Swing/Reaper (...)
[-] [5] [47]
target AoE, can inflict Stun
(Swing And Stab/23, Thrust/25, Lawn Mower/25)

Brain Shaker/Split Cranium (ffs)
[Focus - Feint - Thrust] [4] [51]
can inflict Psyche Down

Aiming/Aim
[Focus - Focus - Thrust] [5] [55]
unavoidable, pierces defence

Squash/Puncture
[Feint - Backslash - Thrust] [6] [57]
(Lawn Mower/30, Double Thrust/31, Swing And Stab/32)

Shining Arm/Arm of Light
[Charge - Feint - Thrust] [8] [63]
unavoidable

Heavenly Strike
[Backslash - Backslash - Thrust - Thrust] [10] [65]
(Lawn Mower/34, Double Thrust/35)

Beast Lightning
[Prepare - Focus - Backslash - Thrust] [9] [69]
can inflict Magic down
(Brain Shaker/44, Rush/45)

Thousand Cross
[Thrust - Thrust - Thrust - Thrust] [12] [80]
bonus damage vs Undead
(Aiming/50, Shining Arm/50)

Fearless Triple/Triumvirate
[Feint - Backslash - Backslash - Thrust] [14] [88]
(Wave Thrust/50, Squash/50)

/HA/

Snake Blaster
[Water - Charge - Thrust] [6] [72]
bonus damage vs Frogs

Twin Dragon/Dual Dragons
[Flame - Water - Thrust - Thrust] [9] [90]

Jewel Strike
[Stone - Water - Backslash - Backslash] [15] [99]


All but Fearless Triple can be sparked off Buffalo/Armor Bugs in VogCanyon.
Fearless Triple can be sparked off Ant Commanders (duel).

Special: Reaction shot, negates damage & attacks opponent. In party can interrupt attack aimed at another character. Basic attacks can miss.

Aim Shot/-ed
[Focus - Shoot] [3] [18]

Random Shot/Rapid Volley
[-] [2] [12]
can miss
(Aim Shot/3, Shoot/7)

Shadow Bind/Shadow Weave
[Feint - Focus - Shoot] [3] [-]
can inflict Cripple/Stun

Arrow Rain/Rain of Arrows
[-] [4] [32]
All opponents, delayed
(Random Shot/17, Shoot/21)

Mind Break/Id Break (LOL)
[Focus - Feint - Quickshot] [5] [36]
can inflict Psyche Down, can miss

Sidewinder
[Focus - Focus - Shoot] [4] [44]
bonus damage vs Frogs
(Aim Shot/25)

Shadow Slayer/Shade Arrows
[Shoot - Focus - Quickshot] [6] [49]
can deathblow

Thousand Needles
[Quickshot - Quickshot - Shoot] [6] [52]
(Aim Shot/33, Mind Break/37)

Rapid Fire/Multi shots
[Charge - Quickshot - Quickshot - Quickshot] [7] [55]

Hi-Speed Arrow/Quick Nock
[Charge - Focus - Focus - Quickshot] [7] [64]
unavoidable
(Aim Shot/44, Shadow Bind-Sidewinder-Shadowslayer/50)

Crystal Prism
[Quickshot - Shoot - Quickshot - Shoot] [9] [84]
can deathblow
(Sidewinder/45, Shadowslayer/45)

/HA/

Bird Hunter
[Flame - Shoot] [2] [31]
bonus damage vs Flying

Poison Arrow
[Water - Shoot] [4] [25]
can inflict Poison

Death Shot
[Tree - Flame - Shoot] [4] [42]
can deathblow

Spark Shot
[Flame - Quickshot - Quickshot] [7] [51]

Windbreaker
[Tree - Charge - Charge - Shoot] [8] [60]

Spectral Shot/Izuna
[Beast - Beast - Beast - Quickshot] [9] [66]

Flame Bird/Fire Bird
[Flame - Beast - Shoot] [9] [33]
LARGE heal on damage/lifesteal


All can be sparked off Buffalo/Armor Bugs in VogCanyon.

Special: Can rarely block, negates damage.

Roll Beat
[Swing - Swing] [2] [10]
unavoidable, user Psyche Up

Heart Beat
[Focus - Beat] [3] [14]
can inflict Cripple

Lobster Slayer
[Swing - Feint - Swing] [4] [28]
bonus damage vs Crabs

Bone Crush/Bonecrusher
[Focus - Charge - Beat] [4] [31]
bonus damage vs Skeletons, can inflict Morale Down

Head Splitter
[Focus - Focus - Beat] [4] [34]
can inflict Psyche Down

Gong Beat/Gong Ringer
[Prepare - Charge - Swing] [6] [42]

Painful Beat/Cruncher (?)
[Prepare - Focus - Beat] [5] [45]

Rock Crush/Rock Splitter
[Charge - Beat - Beat - Beat] [7] [50]
bonus damage vs Rock

Turtle Killer/Nutcracker
[Charge - Focus - Focus - Beat] [10] [61]
unavoidable, can inflict Defence Down
(Painful Beat/45, Lobster Slayer/50)

Grand Slam
[-] [8] [74]
hits all enemies, unavoidable, delayed
(Head Splitter/48)

Time & Tide
[Feint - Focus - Beat - Beat] [14] [77]
unavoidable, can deathblow
(Painful Beat/53, Roll Beat/55)

/HA/

Gale Strike
[Tree - Swing - Swing - Swing] [7] [74]


All but Grand Slam can be sparked off Buffalo/Armor Bugs in VogCanyon.
Grand Slam can be sparked off Megalith Beast.

======================================================
AH YES THE SPELLS, I AM NOT BUTCHERING THE OG NAMES
======================================================

==========================================================================
ADDITIONAL MENTION, COMBOES WITH + IN THEM CANNOT SPARK DURING DUEL
(they can still be learned post-duel).

i.e:
You can pick Rich, duel Anima Ghoul (in Laubtower), use Tone once then kill the ghoul with bear crush and post duel Soul Hymn can be "learned".

It will probably take some time, as learning spells this way is more tiresome than simple sparking (since you have only 1 chance per battle - during the post battle rewards), so I would suggest either doing it in party battles (esp. since you can do multiple characters at once); just check again for who can actually learn the spell; unlike weapon arts spells can be only learned by specific characters (I wrote everyone who can acquire the spells), or to get some good weapon arts so you can use anima + 3 command to oneshot monster.
example:


==========================================================================
TREE
Needle Shot
[Tree - Stone] [4] [36]

Life Water
[Tree - Water] [5] [30]
Recover HP, recover K.O

Woodstock
[Tree - Beast] [5] [32]
bonus damage vs Plants

Sleep
[Tree - Tree - Flame] [5] [-]
target AoE, can inflict Sleep

//FOLLOWING SPELLS cannot be sparked during duel, but can be learnt post-duel
Bushfire
[Tree + Flame] [6] [28]
Large circle area
(Narcisse starts with it)

Song of Earth
[Tree + Tone] [8] [-]
hits all enemies, can inflict Fear/Confusion
(Labelle: Tone/36, Cordelia: Tree/36;Tone/38, Julia: Tree/36, Raymond: Tone/40, Sargon: Tree/40, Rich: Tone/40, Gustaf: Tone/40)

STONE
Delta Petra
[Stone - Tree] [6] [50]
cone AoE, can inflict Petrify

Magmaxplosion
[Stone - Flame] [5] [38]
target AoE

Water Hammer
[Stone - Water] [5] [20]
can inflict Fear, additional hit will turn to Confusion

Guard Beast
[Stone - Stone - Beast] [9] [-]
one ally, ~25% chance to negate damage

Stone Armor
[Stone - Stone - Stone] [4] [-]
one ally, Defence Up

FLAME
Recovery Breath
[Flame - Tree] [4] [-]
one ally, remove abnormal status effect

Flame Naga
[Flame - Beast] [5] [40]
target AoE, bonus damage vs Frogs

Incineration
[Flame - Flame - Tree - Stone] [10] [75]
can inflict deathblow

//FOLLOWING SPELLS cannot be sparked during duel, but can be learnt post-duel
Firestorm
[Flame + Tree] [8] [66]
hits all enemies
(Kelvin: Tree/28, Wil: Tree/34;Flame/33) rest irrelevant, comes from Wil vs Egg

Soul Hymn
[Flame + Beast + Tone] [16] [-]
all allies, Regen, Morale Up
(Kelvin: Flame/43, Ventarbre: Tone/43, Rich: Tone/46 !CAN BE SPARKED OFF ANIMA GHOUL!, Gustaf: Flame/42;Tone/44)
ALL HAIL SOUL HYMN

WATER
Aqua Viper
[Water - Beast] [4] [18]
line AoE, bonus damage vs Frogs

Call Thunder
[Water - Water - Tone] [7] [60]

Permanence
[Water - Water - Stone - Tree] [8] [-]
one ally, prevents status change

Heavenly Thunder
[Water - Water - Tone - Tree] [9] [70]

//FOLLOWING SPELL cannot be sparked or used during duel, but can be learnt post-duel
Sonic Poison
[Water + Tone] [5] [44]
hits all enemies, can inflict Poison
(Cordelia: Water/20;Tone/24, Wil: Tone/23, Venta: Water/21;Tone/22, Julia: Water/24, Sargon: Tone/23, Rich: Tone/23)

TONE
Spoil Wave
[Tone + Water] [3] [-]
line AoE, can inflict Psyche down

Sonic Sanctuary
[Tone - Stone] [4] [-]
one ally, Magic Up (magic defence up)

Hymnal
[Tone - Tree - Beast] [11] [60]
hits all enemies, bonus damage vs Undead

//FOLLOWING SPELLS cannot be sparked during duel, but can be learnt post-duel
Sonic Burner
[Tone + Flame] [6] [21]
cone AoE
(Venta: Tone/17, Eleanor: Flame/13, Sargon: Tone/16, Gustaf: Tone/15, Roberto: Tone/15;Flame/15)

Stone Memory
[Tone - Tone - Stone] [7] [-]
can inflict Petrify
(Narcisse: Tone/35, Kelvin: Tone/33, Cordi: Stone/35;Tone/33, Venta: Tone/35, Raymond: Tone/36, Sargon: Tone/35, Rich: Tone/36, Gustaf: Tone/34)

BEAST
Berserk
[Beast - Beast - Beast] [3] [-]
one ally Berserk, Morale Up

Regenerate
[Beast - Beast] [3] [-]
one ally, regen

Reviva
[Beast - Flame - Flame - Beast] [9] [-]
one ally, revive once

//FOLLOWING SPELLS cannot be sparked during duel, but can be learnt post-duel
Mindscape
[Beast + Tree] [3] [-]
all allies, Quick Up
(Kelvin: Tree/12, Tyler: Tree/17, Wil: Beast/15, Rich: Beast/13, Raymond: Tree/12;Beast/10, Gustaf: Beast/13, Meythia: Beast/12, Ginny: Beast/12)

Howling Heaven
[Beast + Tone] [5] [32]
hits all enemies, can inflict Morale down
(Kelvin: Beast/18 !OFF GREMLIN!, Venta: Beast/22, Julia: Tone/23, Rich: Beast/23, Gustaf: Tone/21;Beast/21, Meythia: Beast/24, Roberto: Tone/25;Beast/25

SaGa Frontier 2 is absolutely great game and I love the fact that it was remastered in a good way.

Hope this aids you in your adventures :)
Feel free to ask any questions, however there is no guarantee of an answer :P

Cheers,