For Lightning main, you c*e for ex: Sai 3* (now I have 4*), Pain-Shurado 3* and Kankuro GNW 2*
Don't forget to cultivate your ninjas, upgrade level and stars and awaken.
With my line up, you don't have too much combos (5-6-7 combos) but you have a great resistance and attack damage.

Put there your ninjas and I try to help you with another line up.