okay, unless things have changed, playing with higher/lower level friends is not boosting. If i remember right, boosting is where you get two seperate parties filled with friends about the same level so that both parties get teamed up in matchmaking together. Then one team purposely loses to get teh other teams level up. Thats boosting, cause a friend of mine was trying it and was constantly spamming his friends with messages requesting a certain level clan.