IMO you log jam is with the Ace / Pyro / Spit Fire / Fired Up. Personally with those balls - assuming you want to get down from 9 to about 6 I'd go with:
Trifecta - your only real heavy oil ball
Pyro or Ace - pick your favorite pearl particle
Domination - medium heavy
Spitfire - medium to slightly lighter
Banshee - this is my get-out-of-jail-free ball
Spare
IMO Spitfire and Fired Up are for the same shot. Yes, there motion is a bit different so go with the one you like.
Depending on if you want to go with even less than 6 you may want to rationalize between the Pyro and the Spitfire for the step down from the Domination.
Personally I am keeping 9 (4 reactive, 4 particle, spare) right now so I'm probably not a good reference point. If the issue is the wife why not hide a few in the center's lockers
.
Good luck with the trim down.