Hinata and Karin now are OP for f2p players, so necessarily put them in team. Last slot... Now maybe Kakasi, but later put Saske 3 star instead of him. Later u'll get better ninjas and can change something, but Hinata can stay in your team up to 100 lvl.

Lineup:
x - Saske - Hinata
x - Karin - Main
x x x

Talents: Stone Jitsu - Earth Shield(if havnt yet, use Hurricane) - Lotus - pose of Duel - Steel Body.
Pet after lvl 50 - White Snake. Also you must farm asap Dog Shiba and Bull.