battle.c is where you change the damage for any skill.
i've been looking for stuff like this myself, particularly i'm trying to change how quickly multihits hit next. i don't understand why they're so damn hard to find. anyways, my guess is this. this is where special exceptions for AoE skills are defined, so i assume the "non special exception" is for the rest of the AoE skills. the problem is i have no clue where any of this is defined for each skill individually:
i might be wrong though, but i can confirm that both of the spells do inflict a square so that might actually be it. where the hell is the i variable then?: