This person obviously needs to be reliable, since this is technically cheating.
 Make sure it has a silencer.
 Ghost keeps you unseen by UAVs, and Ninja allows you to stay completely silent. These perks will help you not be spotted and disturbed by other players.
 Join it.
 Find his name on Xbox Live and select the option to invite him to your game.
 If you don't end up on different teams, back out and join a new game until you are.
 You don't want real players finding you and killing you. Set down your tactical insertions.
 Maximize your points by shooting each other in the head.
 The final kill gets displayed on the game ending final kill-cam, so people would know you are boosting.
Get another player.
Make a class with the gun you want to get XP in.
Add perks like Ghost and Ninja.
Find a public match.
Invite your friend to the lobby.
Get on opposite teams.
Find a secluded area.
Take turns shooting each other.
Avoid being the final kill.
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