This is kind of funny, but its like cheating too..You start a game on Coagulation, and you still have "Primary light vehicle" and "Primary Heavy vehicle" in quick options....
Then you start the map.....
You take a banshee and make sure noone is seeing you then you fly up to the "Wall" to the left of the red base and jump out of the banshee....
You can sit there and snipe others very easy....
P.S Make sure you got the sniper rifle...