I mean you can use anything really, but nothing can really compare to Jakobs or Lasers on her. And IMO Snap Shot is worthless, and a build without at least 5/5 Trick Shot is lacking.
No need to melee, her melee skills are mostly aweful, you just take thunder crackdown because it gives you a higher stack cap. also don’t bother with trick shot, it does nothing if you just don’t miss all the time. You almost certainly want hot lead over crack shot: crack shot only applies to one shot per mag and adds with her other gun damage skills, whereas hot lead is a multiplier that can effect every shot in the mag
Penetration, The Unforgiven, big bore shotties, etc… There are plenty of reasons to take TS, and plenty of ways you can “miss” that are out of your control. Not to mention TS aims for you, allowing you to get better KPS, and it allows you to aim at things you don’t have line of sight on.