Are you ok potentially splitting up via Single Rider? If so, I've recently done something similar (albeit for Test Track and Mission:Space vs. Frozen - but same idea).
-Book Frozen FP for the mid/late-afternoon. You can also grab any other Epcot FP you would like.
-Get to DHS in advance so you can hit rope drop. Buying donuts from Erin McKenna's or another bakery the day before to bring with you in
your bag to "eat while you wait" highly recommended! ;-) - or simply arrive early and walk down to grab a bite at the Boardwalk or Swan/Dolphin and walk back (calorie burn)!
-Go immediately to Midway Mania at rope drop.
-Then head right to Tower. It's line doesn't accumulate as quickly as RnRC. But, there's no single rider option.
-Upon leaving Tower, go to RnRC. Scope out standby. Sometimes it's not too bad. If it's getting longer, jump in single rider. Usually by this time, the morning rush of single riders has died down, so it's not longer than 15 minutes or so.
-Then head over to Star Tours standby.
Even if the lines are long at that time, this typically should have you done with Hollywood Studios before Noon with a 9am opening (if not before that). Then, you can take a leisurely stroll or boat ride to Epcot and enjoy the afternoon and evening.
One note - be sure to check the EMH schedule, since it sometimes changes. If you have EMH at either Epcot or DHS that day (and are staying on property), that changes the recommendation!
