based on the characters you mentioned, it seems that you have a pretty strong team already, but adding Naruto and Sasuke could provide some additional firepower and flexibility. It would also depend on the specific abilities and strengths of the characters you want to add and how they complement your existing team.

As for not putting one character on formation, it would depend on the specific game mechanics and how you want to use the characters. You might want to keep a strong character in reserve to swap out for certain battles or to use in a different combination for a different strategy.

Overall, it's important to consider the strengths and weaknesses of each character and how they work together as a team in order to create a well-balanced formation.