It doesn't seem many people are trying different and interesting ways to kill the raid boss yet, but here is a quick theory that may be interesting provided you can find 6 hunters to do it with. The "Way of the Sharpshooter" tree in gunslinger has the benefit of creating orbs for your team with each precision shot. With 3 shots that would allow each teammate to create 6 orbs each. Provided everyone hit every shot that would be a maximum of 30 orbs for each person to be able to collect for each set of supers cast, which would insta-recharge everyone's super, allowing them to repeat the process until enough people whiffed there shots or the damage phase ends. I could be missing something that would nullify this tactic, but if it worked I would assume it could result in a seriously fast kill. Edit: I ended up doing a raid with 3 or 4 gunslingers on calus, and it was quite ridiculous. I was able to get 2-4 Golden Guns per rotation. Even the warlock on our team was throwing 3 or 4 nova bombs per rotation just on the orbs generated by the Gunslingers.