oh haha yeah well spells just wont use mana in this case, mana would only show the added damage. but i guess it doesnt have to be mana, i could show it through lumber or something. mana is just easier because the scale damage is based off intelligence and wc3 automatically handles the relationship between intelligence and mana--no triggers necessary. Like i said, its pretty flexible.
and i suppose text tags could work as well, which do you prefer?