So I already upgraded it to +3 and I want to know when it's best to stop Upgrading it? Because I don't want to grind for a long time just go down the floor after exploring it all. (I've won twice now, I don't know of this helps saying it incase it is helful)
Most if not all of the item changes look really cool! For the characters they don't overall look better or worse in my opinion, it just looks different which isn't a bad thing.