As previously said, get multi target AOE damage, against single teams like KCM Naruto, or across teams like Edo Deidara. Maybe get a few interrupters like Iruka or Guy (although I find they often all target the same ninja and not always the ones you expect). Get a few healers or people that can clear debuffs like hanzo, gakido or tsunade. Try a few wild cards like a skill broken Fuu,or suit sai to mess up the enemy's combos, or maybe someone who can revive like Jigokudo. Pick the ninja that you want, then use a combo simulator to put them into the best 4's for combo's

https://en.konohaproxy.com.br/

When you fight watch the battle, see if your ninja have bad synergy, or if someone isn't performing. You get 5 goes a day, use them for trail and error until you have the team you are happy with. Also don't be upset if you can't beat 6 path naruto, he is the king of ranked atm.

Have fun.