I like to think about Kuhaku as a Jack of All Trades who relies on tactics, adaptability and skill to win his fights without having to fall back onto raw, brute strength but with that option hidden and there if needed. His illusionary skills can be used on both enemies and allies to serve a defense/support role.

But yes, Kuhaku still needs a team to be formed up or decided for him. I'm sure Kuhaku can easily fit into any team with no problems.