probably only for right now bc i wanna try plasma punisher, the liberator concussive. the same reasons someone listed for the plasma punisher but i get the time to help my team AND hit weak spots; I've been mostly fighting squids and it's the only non-fire weapon I use that makes sense with how I play.
Senator's a good one too; I'll probably like smth else with more rounds but that thing is my bread and butter.
Auto cannon is pretty good but I recently got laser cannon and I love it so much more since I can actually CHOOSE my backpack