Common question - IMO the right way to set up a tourn. arsenal is to come up with a list of ball reaction characteristics that you will need and then backfill into available balls. You should look at length, reaction shape, and reaction speed. A good mix of pearls, solids, pearl particles as well as differing RG / Diff. cores should work.
Initial reaction is you have 2 solids and 4 pearls. Rapid Fire, Spit Fire, and Street Rod Pearl are relatively close. I would consider dropping the Spit Fire for a Shift.