Like the other poster said, getting 4* SOSP Naruto would be good, but that's probably a pretty far-off goal for you now, and by the time you save up enough coupons to buy him (like 30-35k coupons) he might not be the top meta anymore. I would say just save your coupons and watch the meta. For now, you can try this team:

Pos 1 Roshi [Edo], pos 2 Hashirama [NY], pos 3 Fire main, pos 4 Rin.

Main character talents - for the mystery you c*e either the sealing lock (#3) or the illusion mirrors (#4), standard #2, chase #1, first passive #2, and second passive #1. For the chase summon, use the Dog of Hell or Ninja Dog Shiba if you don't have the gold summon.