well all of those are good tactics, I won't vote because I am partial to almost all of them except coward. I tank with my rpk, snipe and camp with my l96 arctic, and stealth with pp19 mod camo.
The to main categories are camping and rushing(tanking) though. Although camping is hated among newbies and fallen victims XD.
EDIT: Oh wait, you can choose multiple options? yay!