My free to play teams:

(Karin was free from a fireworks event recently, Guren in the Autumn Season, Yamato was kinda cheap, but he's not neccessary.)

Edit: I made an error in the talents, for the Yamato lineup I used the clone talent and the phoenix chase.

Pretty obvious strengths and weaknesses but I'd like to point out: even if the opponent has immune ninjas in P1, usually at least one of theirs will die early in round 1, (while also suffering a lot of collateral damage) which can give you the upper hand.

Won't do miracles against fancy ninjas, or if you're P2 is slower than the enemy's Edo Itachi or whatever, but it does okey, even against the cookie cutter Naruto teams or even certain Kakuzou lineups.

Not sure if it's a good team for you, it worked out for me, maybe it's worth a shot if you're struggling