101Leafy researched the game to work out its damage formulas. Pick the two units and their gear, and the page works out their battle numbers, the damage, and the chances to hit and to land a critical hit.
Stats are the base stats plus what the gear adds, up to 40. Each human has an own critical bonus of 0, 10, or 30. Humans take 100% from every element except expel, which does 50%.
How damage works
Attack = St x St / 6 + 10 + weapon attack. Defense = Vi x Vi / 12 + 5 + armor defense. All divisions round down.
Magic attack = Ma x ((Ma + In) / 2) / 7. Magic defense = In x ((In + Ma) / 2) / 7 + 5.
Hit = (Ag + In) / 2 + weapon hit, or + 80 with no weapon. Evasion = (Ag + In + Lu) / 3 + armor evasion. Critical = Lu / 2 + the race's critical + weapon critical.
Attacks: attack - defense, at least 0. A slayer weapon against its races uses (St x St / 6 + 10) x 2 + weapon attack instead. The result is scaled by the attacker race's damage against the target's body type.
Spells: power + magic attack - magic defense, at least 0, scaled by the target's affinity to the element. An expel spell that hits a Jarei does all of its HP.
A critical hit doubles the damage. Only attacks roll for one, and only after they hit. Damage stops at 999. There is no random spread.
Hit chance = hit - evasion - the terrain evasion of the target's tile, each step at least 0, up to 100. Critical chance = critical, + 20 at full moon. A chance of 0 never happens and 100 always does; in between the game rounds the percent down to 128ths.
