I made a team for survival trial, with kakashi, sakura, naruto and kankuro. This team is pretty strong, can carry me until the last enemy, you should try it and use your main instead of kankuro.
that is the formation i was using before i got kakashi. I am now trying out kakashi, Main, Sasuke, Kabuto. They do 7 hit combos and have great synergy. However, they seem to be lacking defensively, esapecially with kakashi as a tank <:3_50:>
Kakashi is not really tanky, you might want to try to switch sasuke for hinata, you will get a 6hit combo.