As far as tactics go, play tight. Keep as little of yourself exposed as possible when popping out for some shots. Also practice your snap-shot; it's a godly ability. One of the things vital to being able to tear a whole team apart is keep advancing. Get a few team mates to go with you, so even if you are eliminated, there's a good chance one of your 'mates will plug the guy who shot you. Oh, never advance and back up. When you choose a new bunker to occupy, be aware of where the other team is and if they got a good shot at your bunker and vise-versa. All this can be done without thinking all too long if you walk the feild before hand.