What is the best way to level up in cod mw2?

1.ask a friend to join your game

2.go to team deathmatch express

3.ask your friend to leave the game when u do

4.when u leave the game go to 3rd person cagematch really fast or its not going to work

5.wait for the game to start

6.when you are playing choose the riotsheild class and ur freind chooses the class with a lmg

7.he shoots your riotshield and you get 100 xp per every 10-15 rounds

8.rank up!!!