I'm lvl 51 and I currently have Sasuke 3 stars and HInata stars in my team along with my main wind 3 stars. I have Karin 3 stars from the treasure but I also recently got Sai 2 stars from the shop. I don't know whether to use karin or sai in my team. I know Karin along with sasuke and hinata gives along 8 to 9 combo but she has the worst healing ever and not so great defense. Any help here?