So i came across few healing ninjas and one of theme is sakura. Since i don't have karin or sizune i tought i needed a medical ninja on my team i ubgraded ger stars and i have awaken her but i still feel she is lacking strainght. On the other hand Karin and Sizune have high healing rate and high poison dmg rate. When u have sakura make sure she is protected because she is a fragile ninja if she is not powered up. for instance one of mine lineups for protecting the medical ninja.
you can notice in the first picture that i use zabuza as a double sheild cuz he generates a high defence clone and in the other pic i have made a lineup with a much higher defence rate cuz of the double clone sheilds and a talent that wind ninjas have to provide sheilds for female ninjas.
I hope i have helped you and i hope you protect you medical ninja.