I run several teams atm, also f2p.

Main, Hinata, Kakashi, Karin, I use Ninja Dog Shiba summon to achieve quite a big combo from any angle.

Main, GNW kankuro (Got lucky with a seal draw on this one), Tenten, Kakashi, Ninja Dog Shiba summon, very burst heavy team

I have several others but I alternate between these two mainly.

You could also do, Main, Guy, Hinata, Kabuto