Shadow Imbuement Dilemma

I’ve been using Bitter Infection for a while now on my Shadow Clone build, but I’m wondering if I’m better off using Corruption instead?

The wording is so vague, saying it increases the potency - is it a multiplicative boost to whatever damage it’s already doing ?

And this just shows I really need to read how skills work more closely lol, actually never realized that Shadow Imbuement basically does nothing on hit without Bitter Infection, only when the target dies or the effect wears off… That’s actually a big problem with how spammy my build is, crap.