if you play in wasteland its easy. just get your harrier and call it directly on top of the bunker (where most every body tries to get to.) then thatll get you 6/7 kills (one time it got me 12) and get an
AC130 the reason you want an AC130 is because once you kill the enmy team, they all spawn in the same place (especially if your playing domination and the enemy team only has one flag) and you can just keep lanching big bombs and get a 3x or 4x kill. then use your small and medium bombs to kill runners. then go back to your big missile wait for everyone to spawn in the same place again and repeat the process. this got me 16 kills. badabing you got a nuke