I'm sorry, I really should have said that.
Attack Power is just like +damage, but will also affect spells/abilities for my melee classes.
I want to create a shield system, where the shield will damage like armor did in WC3, aside from the regular armor system I will use for non-shield users.
Armor Penetration will be ignore a % of armor
Spell Armor will mitigate an amount of spell damage
Spell Power will affect the damage/heal of spells/abilities that require mana
Exp + will increase the amount of experience earned for every kill my a %
BTW, tyvm for responding so fast, I really want to contribute to the modding community.