Crossing is, as everyone has said, the most important task because you cover more territory that way. Pretty much by watching and listening as to what is going on with the rest of everyone else you can figure out what the other one person you're not watching is doing...the tape can't just run out into the open randomly and not expect to get shot out by the rest of your team, can he? Usually not. There will be some effort on the part of the rest of his team to put everyone else on yours down so that they can go about their business. Pay attention to whose heads are being kept down and from where and you can tell what can happen, and chances are you'll be able to pick off their cover fire as they're out shooting but not at you. Often times you can tell what move is wanted because the cover fire will, if they have any coordination whatsoever, directed at who is most likely to see them and/or the intended recipient of a bunkering. Read the directions and think ahead so that when you pop out your barrel points directly at the persons shooting and you'll snag a gog shot or two nearly every time.