Damage Calculation:
Damage formula posted by asagisuisen:
Damage = Floor[{(Attacking stat (ATK+MAT for glitch skill)) * (skill coefficient)} * Defense Value * Critical Value * Attribute Effectiveness * Reduction from defense * Difficulty Adjustment * Random number (1 +/- 0 to 0.0006) / 100]
- Skill coefficients are completely different from the values shown ingame. Enemy skill coefficients are listed in the enemy stats paste. Values for common player skills are listed at the bottom of this paste.
- For enemies, Defense Value = raw DEF/MDF value from the enemy stats list (so higher DEF/MDF = more damage taken, not less). For player, Defense Value = (1000 - DEF/MDF) so a higher stat is better as expected
	> Glitch skills use the lower (better) of the two possible Defense Values. So they're bad unless used against an enemy with similar DEF/MDF
- Critical Value = 1.5x for critical hit, 1.0x if not
- Attribute Effectiveness = 1.5x supereffective, 1.0x neutral, 0.5x not very effective
- Defense reduction is 30% for guard skill, 90% for player triple guard
- Difficulty Adjustment = 1.0 whenever you attack the enemy. If you're being attacked, it is as follows:
Easy/Physical = 0.4, Easy/Magic = 0.2, Normal/Physical = 0.9, Normal/Magic = 0.8, Hard(either) = 1.0
	> Notably, almost all OP skills from enemies are magic (___ Code etc)

Other notes:
Azure Bullet is the strongest skill against Sun, Aster League against Star. Moon is close for both (55.5 vs 54) but Celica usually has much higher ATK than Clea.
Enemy skill coefficients are low values and are magnified by their big offensive stats/your much lower health pool and defenses.

Player skill coefficients:
SHINA
Lunamis 2.5
Lunamissimo 6.4 (0.8x8)
Lunamispolo 16 (8x2)
Lunamis Diapathy 22.6 (2.2x8 + 5)
Lunamis Imization 22 (4 + 6 + 12)
Rokudein 3
Rokudian 8
Ache/Stark 6 (3x2)
Achewave/Stareig 9 (3x3)
Superbloom 14.75 (0.65x15 + 5)

AL
Sol Strike 3.5
Sol Spear 15 (5x3)
Sol Lance 25 (5x3 + 10)
Devouring Flame 18.7 (1.7 + 2.25x6 + 3.5)

CLEA
Cerulean Bullet 36 (6x6)
Azure Bullet 54 (7x6 + 12)

CELICA
Aster League 37 (10 + 9 + 18)
Astate 13 (5 + 8)
Comet Faye 5.5 (2.5 + 3)
Comet Fang 21.5 (3.5 + 6 + 12)
Fantasia 13.5 (2x4 + 5.5)