I hope i can at least reply to a post even under "probation period". No i could not so this message again is 30 minutes late.

Ehm, My advice is actually to get both roshi and han if you can. When the next rebate comes you will probably be able to get both super rares (50+ scrolls from rebates and you will have around 350 yourself). With water main the sailor sakura, han, roshi team is very strong against all other meta teams currently out. With the exception of, you guessed it, tenten rush if it was positioned properly and DP hidan teams (50/50 chance of winning there).

If you lucked out and have KOH one of the most brutal teams out there right now is the hanzo-roshi-han FM team which is strong against everyobody with a hard hitting roshi chase.

We do not know when GNW treasure will come out (wont we get the lightning treasure with raikage first?) and by the time you will probably have saved up a another big batch of seal scrolls. So i would go on a spending spree while the rebate is on, specially if you are bored with your current team. The Han-Roshi team is pretty fun to use and it is not so initiative reliant as the tenten rush.