bAddMagicDamageClass, bAddDefClass etc.bonus2 bAddDamageClass,n,x; +x% extra physical damage against monsters of class n
Against players, n is their job id
Job ID is a no brainer. But I couldn't find any description on class of monsters in item_bonus file.
Is there a reference at all ?
The only thing i can think of is boss/non-boss, probably not in the right direction