So I'm thinking just 2 isn't really enough, but BIS for every slot is too hard, and we don't even necessarily need that. Also, some utility items probably have other places they should be equipped, like backpack slot gear should go ... guess where. Can u guess? Hel charms should continue to fill ur inventory. If you could wear a shield without using inventory space, then it would be an outfit. Maybe 'don't panic' towel can just go anywhere it fits, including aux slots?
Alright here's what I got now:
(Note, for now you have to pretend that non-utility items won't go in places that they shouldn't. And this is just a demo, not complete.)