There's 3 class setups depending on how you want to play straight OMG straight shotgun and hybrid
Best setup I've used for hybrid is
Ohm: QuickDraw grip, laser, and red dot this is good for the hybrid the OMG becomes so op with accuracy of an ak and good damage plus the shotgun is better used as well with 40 read that 40 bullets and better accuracy
Perks: I run lightweight, and I call it cold blooded still.
Perk 2 slot is fast hands (you can use anything else)
Perk 3 is toughness for shrt and long rage gun battles
And perk to make your exo burst quiet
With exo stim
For shotgun build use rapid fire, laser, and QuickDraw incase you don't want to spray
Same perks/ exo ability
For just Lmg
Use everything for the hybrid except laser the red dot sight is good enough many of you may not like the loe ammo for an Lmg so use extended mag but the hybrid is the best way to go even if you want to use just Lmg
Same perks/ exo ability
This guns has amazing potential