2-2-2-2-4

White Snake summon.

With this build, you can bring up both the barrier and Hinatas mystery in round 1.

In round 2 with Chiodri, you can trigger her chase and interrupt the enemies mystery. Once u have him, you do use Pakkun as mystery summon.

On that note: you are aware, that you can farm the purple and blue summon on the world map, right?

If you have 300 coupons you could buy and replace Asuma with Make-out Kakashi. This would allow you to trigger both Mains and Sasukes Mystery in the 2nd round.

Well. First thing you should do is hit every summon at least once (do 1 capture attempt). You will get 25 frags and a rune (IIRC) for the first attempt. You would lose this possibility if you drew that summon from your free draw / with scrolls.