Hmm, I not yet taken victory crawl to get the m-coms. I go around lying down people, through spawn campers, clear out people who think they can snipe, kill the only people that ever disarm, arm the m-com A then hope I can survive the CF zone long enough to keep the only people that ever disarm from coming back. If I can survive all of that it's pretty easy to roll on over and arm A and move on into the tunnels.
On defense I pretty much focus on bush people and people who forgot to crouch.