Harm damage = current hp - d6(nCasterLvl) * 2
instead of current hp - 10x(nCasterLvl)
What does this look like?
damage ranges from 250-300 instead of flat 380 for a 38 1 1 cleric
could add some interesting feats for this perhaps if you have evil domain you'd get +50 damage? maybe something else? since evil domain is pretty dumb and useless anyways