Have you tried using:

Sasuke [Ronin] (Position 1)

Kakuzu [AC] (Position 2)

Omoi [Swimsuit] (Position 3)

Scarlet Blaze (Position 4)

(Obviously, I don't think you have Gamariki but substitute it for any summoning you want.)

The team isn't that great, since Sasuke [Ronin] isn't amazing but it's certainly fun. Mysteries used in Round 1 should be Sasuke [Ronin] and Kakuzu [AC], obviously SB's mystery too.

If you want a functional team that has good round-one potential then I certainly have an idea.

Each of the selected mysteries and attacks is interchangeable. However, they are labeled based on priority with how good they are for the team.

A = Best Choice (in my opinion)

B = A Good Choice

C = An Okay Choice

Flood Dragon can be replaced with Shark. As long as Yugito [New Year] executes both of her chase attacks then it is fine. Hashirama [New Year] doesn't need to be BTs, but he'd certainly make the team better if he were.

No Exceptional Power in both of the teams as they are supposed to be round-one (Sasuke [Ronin] is RNG, depends on if he gets the HF).

Sorry about that, it is very late for me. Hope you'll have fun with the two teams I provided.