So after a few days of struggle i finally won against kages with full free to play team. I completed it with 30500 power.You need these ninjas :
GNW Kankuro ( mine was 2 star)
Shikamaru ( 3 star in my case)
Ino (3 star also)

For summon i used Kyushoku deer.

-1st Turn you want to use Ino on 1st Hokage (Hashirama)
and you dont want your kankuro to get blind from 2nd Hokage (Tobirama)
-2nd Turn use Kankuro's mistery on 4th Hokage (Minato)
-3rd Turn use Main Character's mistery on 2nd Hokage (Tobirama)
and use Ino on 1st Hokage once again
-4th Turn use Kankuro's mistery on 3rd Hokage (Hiruzen)
and also use Shikamaru on 2nd Hokage

After you are finished with 4th round it should be almost over , and just use what you have left
on whoever you think it is best to use on , but you should be cool on whoever you use it on.

Hope this will help you :)

GandalfSensei out.