General question: Mainly looking at shadow snarby, but also general utility in other lategame stuff (other shadow lairs/FSC), what kind of gun armor would be best? Including UVs on normal/pierce/shadow/elemental (it's sort of a given that fire resist is the best for FSC). And shields and trinkets, too.

Specific "what do" question: I'm a reasonably experienced gunner and I wear nameless armor which basically doesn't have UVs. I've got enough money to chase after some good UV gear but not THAT much. And I've got my eye on running shadow snarby, but nameless stuff isn't going to cut it there.

Loadout I use for everything:

Nameless hat (Low freeze)
Nameless poncho (Medium shock)
Grey owlite (Low elemental)
2x Trueshot
Blitz (High fiend)
Umbra (Medium gremlin)
Polaris (Medium undead)
Btb (High beast)

I recently got some good deals on a max pierce hat and a medium shadow hat. So my options seem to be:

1) Max pierce nameless for general everything utility
2) Max pierce justifier for ULTIMATE PIERCE RESIST (lol)
3) Max pierce deadshot for nice pierce/shadow combo targeted at shadow snarby (at the cost of precious ASI)
4) Cash out the max pierce hat, make a medium shadow justifier, call it a day and use the money to buy something else.

And I don't have a UV sash yet, so what should I look for there to best complement the hat? What's a good shield to go with that? And should I swap out one of the trueshots for a quick draw?

Looking to take my gear to the next level, so thanks in advance for any advice.