The longest wait time lately has been for Splash. Star Tours was up to 80 minutes or so but because it load a lot of people doesn't seem to go that much higher than that. Pooh and Monsters and second longest waits then Space or Big Thunder, I think. Have you tried looking at the real time wait times on your mobile? I will give you a pretty good idea. What I recommend is to grab a Monsters FP, queue at Star Tours, get Pooh FP (Splash has single rider), then Space or Thunder.
Edit: It's important to note the crowd pattern has been changing as people become aware of where the FP for ST is. Before it would run out quite late in the day (2pm-3pm) and now it is running out earlier.