I don't know that my plan is "good" or original as it is what most people will likely do. Ha! We are planning on being at the bus stop early to catch the first bus to MK and then will head straight to SDMT and then over to Space Mountain and the other rides in Tomorrowland. On our second MK day we will likely do the same but instead of going to SM will head to BTMR.
If it were me, I would drop the Wave reservation as I would want to be at the park by 7a. Most reports have people entering 45m-1hr before with many attractions starting to run. I think you'd be safe with SDMT, SM and BTMR, but other attractions like Splash probably won't start running until 8a or later.