Just to be clear, when you say “80% desired” do you mean the rolls or the actual stats. IE if I don’t use a skill but tampering gives me that skill it’s way different than if it gives me a bad roll to a skill I do use. If that makes sense how I said it.
So when you say “80% was good” are you saying the actual rolls or you’d be just fine with an item that gave you a completely useless stat and accept that’s great going into end game?