I use just one team and that team lead me to the final without a single lost, just lost against the last one but then i could beat him using the remaining ninjas. Here's my team:

-X- -X- -X-
Kurotsuchi Tsunade (SW) GNW Choji
-X- Guy -X-

Guy Passive for boost Choji's attack, combined with Kurotsuchi passive allows you to provide a second attack for Choji, or a second attack for Guy or even a second healing from Tsunade.
From this 3 options, wherever they are, you'll be gratefull ;)