Main,Kakashi,Hinata and Sasuke right now,get karin and upgrade your sasuke to 3 stars to have more combos

x - x - x
x - main - hinata
kakashi - sasuke - x

Take kabuto from merchant and replace sasuke with him you can do 6 combos and in future upgrade sasuke to 3 stars and take karin from merchant and you gonna have 9 combos

https://i.gyazo.com/b87fd6c7a59ed255f4877e532bc2fa3d.png

Work for ranked battle,arena,all instance,but in world boss you need to switch for light armor and demon and for exam you need others ninjas and other strategy to beat some lvl in exam