I'm in this position with several of my schools being on rolling admission and others not. Unfortunately the only solution I've heard is to enroll in the rolling admissions school if you get accepted and would be willing to go there, then if you get accepted to one later that you like better just withdraw from the first school and lose the deposit. I've heard for Pitt the deposit is $200ish (for occupational therapy at least) which is way less than some other schools so it wouldn't be the worst thing in the world to lose it. It's a sucky situation though, I really wish there was a way to respond to all schools around the same time.