I wrote a guide here: http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=3527&fromuid=26935

basically, have one control team that combos a little and one combo team, and both need to heal a ton.

Unfortunately it's a 55+ guide, but you can try GNW Neji and Gai for the interrupts, and maybe Sakura...

Try to find a friend closer to your level; that'll make it easier.