Need facepuncher/ melee ammo relic/ anointed weapons 'swapping places with clone increase damage'. Heavy weapons and sniper rifle a work best. I also use the executor class mod that gives me 3 to good misfurtone allowing the clone to stay longer. Swap in and out with clone to keep ammo/ dps high. Warning, don't be a martyr when running rockets.
High dps/ mob clear.