best combo team for fire main is: Fire main, sasuke, hinata and karin with combo of 10 with shark summon.
You c*e kabuto in place of karin, or tobi (for more damage).
Fire main, kurenai, hinata and tobi with deer works too.
I am currently using Fire main, Kakuzu, GNW kankuro and hinata team with shark summon. (not much combo but better damage based team) with shark summon.