What do you pair with the Eruptor?

I just unlocked this primary, and it's pretty fun to use at medium range... but once I get swarmed I sorely miss having a shotgun/blitzer-type close-range crowd control weapon.

Arc thrower is okay for this. Maybe I should try some of the machine gun stratagems...

So I was just curious: what does everyone else pair with the Eruptor against the different factions?