I like NLB because of the garanteed PVP sniper ammo, I appreciate SGA because of it's potent Detainment field disruptor strength and I've never used that PS4-exclusive with the high RoF.
I'd vote UR as the "worse" choice between those options because I'm not really the shotgun-type and because I'd always pick an elemental damage weapon over a kinetic damage weapon.
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Take a universal remote and two other friends with universal remote. Then kill vallus taaruc (cabal strike). Most fun ive ever had! Other than that UR is bad xD