So... I take it you don't know that you get SP via bonding with demons and filling out the compendium.Does this game Shrift 1 have new game plus? Going genocide because without those level ups Im worthless.
Yeah genocide isn't a very fun route, because it's just annoying to do (can't do it first playthrough for some reason, final boss is impossible, weird shit like that) so I'd recommend just doing true mercy and being done with it afterwards.