i don't want to do it with you but i think i can help
so go to cage match and get a mic
tell the other person to do headshots with you and if he or she doesn't listen, then pwn them or something
that might work
hahaha
if you want to do it faster, tell him/ her to go by 9 kills(you get 9 then he/she gets 9)
call uav, airstrike off the map, call heli at the last second before you win
if you want to be a douche to the other person, say that you want to go first then after you get 9 kills, leave the game
hehehe