What is most important in order to build a team is this.

What is your power rank in that server.
What are the teams you looking to counter.
How is your single initiative ninjas compared to others especially the 1st position ninja.

With those in mind then you develop a team, which i can help else it is pointless to make a team that will actually got demolished in 2nd round.

btw this is very PVP specific, PVE specific just use anything it works trust me lol.

Regards.