I don't understand what are you talking about. I manually checked every spell inside BE back then, in the testing mode with goblins.
Weird aim can have side-effects when fighting different opponents, you're aiming spells that should hit dead center of the enemy at bottom-center, then add offset and odd anchor (which will be relative to
Goblin sprite if you're using them for target practice but
may not hit the right spot with other mobs. Proper aim doesn't give a sh!t what mob you're aiming at, it will hit proper coordinates relative to true size of mobs sprite and than add offset/anchor if those are overwritten. You prolly misunderstood the system and tried aiming using offset/anchor instead with some attacks). I know it was working vs goblins because I've tried all the attacks many times but they were sometimes off vs other mobs in the arena, at least now I know why

I'll rewrite the code first and then re-declare all attacks properly one by one leaving better comments for future references.
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That said, even with proper aim, we still may add sprite offsets directly to Fighters. Some sprites plainly focus the body of the sprite poorly when compared to the most normal sprites that position it at center.