After my last few performances in the Sport Condition I would say the most important ball for the condition is your spare ball. Make sure that is working. I'm sure several on this board would agree.
But that isn't what you were looking for. Any ball in which you can play inside, where the dryer boards usually reside, would be good. A good man told me that you can't really attack strikes on the sport condition, that the sport condition game is mainly damage control. Hit close enough to your intended target as to leave spares you can hit, and on occasion you will get on a roll and hit some strikes. That being said, pick a ball in which you are comfortable playing inside and do the best you can.
I agree that there is no magic ball, nothing that will make you attack the strikes on a sport condition. Go with comfort as much as you can and be very patient.