Bad juju gets buffed on kill but outbreak perfected continously buffs its damage as you hit enemies with a slow increase after 3x it goes up by 25 every 9 hits
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#destiny2
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Personally, I'd say if you want to use OP to it's FULL potential, coordinate with your fireteam and use as many as possible. Tag those bosses with as many nanites as possible and increase your dmg! If you're running solo missions or looking for simple, white-named add clearing, go for Bad JuJu.