Since this is a fun tournament, I guess it would be fair to share some strategy. Two little perks in the game I and other have figured out.
First is the last stand perk. If your teammate has last stand turned on and they get shot and the other team leaves them in last stand to die you can steal back the kill. If you shoot and kill your teammate you will lose 10 points, but your team does not lose any, and more importantly the other team doesn't get the kill.
Second strategy, helicopters. If you are lucky enough to get 7 kills in a row without dying do not immediately call in the helicopter. If you kill yourself by cooking a grenade or have a teammate kill you, it will take 10 points off their score and 0 points off the team score. The reason behind killing yourself is when you come back you can call in the helicopter. As long as you do not die, any kills that helicopter gets will go towards a UAV, Airstrike, or another Helicopter if it shoots 7 people. This cycle can be repeated as many times as you like, thus you can have a helicopter the whole game if you are lucky. It wont get you a huge streak, but it will get you alot of kills and probably the win. It is very hard to fight the instinct to immediately call in that heli, but try and die first before you do.