[Bubonico] is great with either fire mode and kills any enemy in the game with ease. It takes advantage of [Hunter Munitions] with high crit and multi shot. If you get a riven with reload speed replace Merciless with Deadhead.
TTK:35 sec
Tier: Top Tier
I test all builds against 10 Heavy Gunner Eximus and 10 Juno tech Eximus at lvl 195 SP in the simulcrum. I use the appropriate Amp and arcanes for each weapon type but no Abilities to give each weapon it's best chance of performing. All weapons can be better with a riven, just replace whichever mod your riven roll best matches the current mod in slot.