I used this lineup all the way to lvl 73. Recently changed because people are copying it and I need to stay ahead of the meta.
http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=1290&extra=page%3D1
If you're sufficiently powerful your main team will outlast all other ninjas and still be full health by the end of the match. This even works against ignition teams because once the ignition ends you restore your health back up the following turn. Each character has a way of doing it, Sakura can heal herself or others, Midnight can run around attacking non-tanks, Guy can kick someone in the face, and Kimimaro can mass leech on a group with Bone Forest.
By the time you get to mid game, if Kimimaro is still alive then he isn't dying anymore. He'll leech too much from bone forest every other turn unless the enemy still has a hefty combo alive. I protect this team with Neji and Hinata on the sides with interrupters and a Sasuke/Kakashi in each team with good combos to wipe out key ninjas. Since the interrupters go after jutsu casters, they tend to be the lowest health guys that Midnight will destroy. Every time someone thinks it's a good idea to use a power they don't and then die for their trouble.