Ummm, oh yea. When your rushing, rush with your team. So if you have a party of six with your friends who have mics make sure you guys stick together in a line formation. If some one breaks it then you might respawn on the other side of the map.
In domination: have only one person cap the flag closest to your spawn, and have everyone else cap B. Then, camp the flags. You will win every time. Also when your entire team uses AR's, generally the team will be much more successful.