i think you shouldn't add upgrades,because i like the fact every class have the same power if you know how to use it,with upgrades it's gonna be like the guns,some players will be stronger than others only because they have upgrades
@nexio50 i had that problem,but i know a easy way to get crowns,1st you need a nightblade and a wolver set,with that gear you can easily solo the jelly palace,and you will get 2.5k per run :)
You can see recipes on the wiki