When I say XvX as on the title, I mean even teams on even ground. This can vary from 1v1 to 10v10 to how many people you can get. However, I am mainly focusing on 5v5 games, the most players we usually have. Now, for these games it is usually necessary to split up into different squads, especially if you have some form of communication. (Walkie Talkie, Rape Whistle, etc.) These teams may depend on what sort of players you have, but usually it is mainly 3-4 guys with mid-range AEGs and one sniper if you're lucky. (You definitely do not want the reverse of that situation.) Pair the sniper with a guy carrying a lighter, more compact gun (MP5, maybe M4) and give them a walkie talkie, place the players with the best experience:firepower ratio as an assault team, and leave the others as a recon team. This should work with the recon team moving into enemy territory as quietly as possible while reporting back to the assault and sniper teams, the assault team moving up based on the intel provided by the recon team, and the sniper team staying as invisible as possible and giving support to the teams from higher ground while possibly trying to flank the target.