I personally like to roll with this:
MP5K w/ FMJ
RPG (AT4S now because I prestiged)
Throwing Knives ( to humiliate them and then T-Bag thier corpses)
Marathon
Cold-Blooded
Ninja Pro (so they don't hear me or see me on their little heartbeat sensors and when I use sitreps it's to easy to find them and not as fun
But I discovered today boosters aren't all bad, today I got my all pro challenge by get a no scope collaterall on 2 boosters behind the crate on favela
What is your favourite class for killing boosters?
Post it here