I've done all three without any FP+, so if you are able to book a FP for one of them, doing all three with minimal wait should be pretty easy. TT single rider moves pretty fast, so if you are fine with single rider, I would plan on that. If you can get a FP for Soarin', I would probably recommend Frozen right at rope drop, then TT single rider (a couple of times if the wait is super short), then your Soarin' FP. On a recent trip, we did Frozen at rope drop with about a 12 minute wait, then went over to Soarin' and rode twice with pretty much no wait, then two or three rides on TT using the single rider line. Got all of this done in the first hour and a half to two hours with no FPs (our FPs were for a different park later that afternoon). If they have all three theaters running, it seems like wait times for Soarin' are short for the first hour or so, so another option could be to try and get a FP for Frozen, then rope drop Soarin' and ride a couple of times before heading over to TT single rider.