Well CO-OP hunter is super nice, first I have to play with an idiot who doesn't do anything (ok, he was only lvl 5 but still), then the game sort of freezes after a while, then the timer runs out, the game unfreeses and that bug where the game doesn't continue happens. Ain't that nice.
Back to Team Objective
edit: out of the past 7 people over level 25, 7 only use micro smg. But I have gotten pretty darn good at exploiting them. Kill one, pick up their smg, kill them again, repeat. Switch to your normal weapon and kill them because they'll try to avoid you. Got like 8 kills in a row in the last match with that tactic