personally if I were you playing for free I would definitely go for the three sannin and team 7 combo best free to play team setup until future you get 100 mystical train exchange for hinata naruto combo card and 30 mystical train certificate for garaa and naruto combo but for now I would go for the three sannin and team 7 you can get the three sannin by doing the even dungeon "the challenge trial" and doing it three times a day get fragments slowly but youll get there soon