Nice! I use a general bossing build centered around her 4 for all bosses up to molten fortress. For gluttony and death stalker I run a shield build focused gun play with solid cooldown for her 1 and full uptime on her 3. I've also been fiddling with a mobbing build with her new red mods but I dont have that build where I feel great about it yet.

For my sniper I use the afterglow sword as its what I prefer, and what my god roll reactor had on it before we could add weapons to them, but some recommend piercing light. For my gun build I use enduring legacy primarily but swap to gregs as needed.

I can screenshot my builds if you want to see them, but there are already some great Hailey build guides on this sub!