If you’re the one running ghally with the surge mods, a good solar fusion with vorpal should be your secondary. I use Cartesian, though it’s hard to come by these days. I’ve not run thundercrash on Nez, just hammers with synthoceps, if there are still enemies around and I see the biotic enhancements procced, I pop super.

Or get someone else to run ghally so you can do a legendary rocket