I think you should be able to do a come back in that account, you have very good ninjas and king of hell, also your power is not too bad for your lvl, if anything if you ''whale'' a little bit more it should make it easier.

And about your team why don't you run lighning main with killer bee roshi and DP Hidan? i think that team is much better than the one you are currently using because minato isnt good at all in there he only buffs your main and its not really a great buff

About what ninjas should you should get, it depends on what teams are you facing in SWB but i think you should get Masked man because he is a very strong counter for a lot of Lineups.

Jib Edit: Let's be respectful of others and keep it that way! Thanks for understanding.