minimum throws would probably be 1 right? You would have to use the phoenix edge though.
also might I suggest all throws as well, throwables that can break can just be thrown at the ground or something but throwables like knives must be thrown at enemies so that all the throwables are exhausted before you enter the next room. I've done this before so I know it would work. (quinn has as well) It's one of my older ideas but I think it would be a good one.