I can't even remember the names of the weapons anymore but the Grenade launcher that leaves the puddles that damage folks, and the Crafted SMG that poisons, really made that place easier.
Just need to switch them out.
I want to say my first legendary run in there I was using the crafted SMG, a Gunslinger hunter, and the Calus Mini-tool with the maxed out incandescent. None of which helps you anymore, sorry man, just reminiscing lol