To make it more viable in PvE and keep it balanced in PvP, it should explode on kills, killing adds all around. It should also deal more damage per bullet, not more damage than precision golden gun, but something that makes it worth using. It's the most aesthetic subclass but it's near useless in PvE.
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In PVE I typically just use Celestial Nighthawk and bottom tree but occasionally I run 6 shooter if I need to get super multikills for a bounty. If you have a horde, you can deal with them pretty good.