u/Borbi17

I know it is a common topic and there's plenty of post about this build. I started with bullet king and understood my dps could increae a lot by using m249 with frenzy. Am I right? As for exotic piece I'm running Memento over the gloves for armor regen and a lil dmg increase. I know overdogs is 30% dmg increase but the gimmick of find the right ppl to shot can be too much for on stressful situation. Last info I ask, expertise everything to lvl10 is worth? I'm fairly behind the expertise grind and reach 30 looks like a lot pf struggle. Any tips is appreciated ty in advance fellow agents