We did the afternoon break every day except for AK. The DS's didn't
nap 
of course, but we hung out in the hotel room or went to the pool.
It's hard to make an exact schedule because there are so many variables. About the closest I got was to make a plan of which direction to head. For example, we did two days at Epcot. The first day we did the right "side", starting on the right side of Future World, then the countries on the right side. Second day we did the left side. (taking the afternoon break back to the hotel between the Future World and World Showcase, it broke itself up very nicely) MK we did two days, and the plan was to do the right half first day and left half second day, with a rough idea of what areas would be morning and what ones evening. AK we hit the Safari first, then went back to DinoLand and worked our way counter-clockwise. BUT. Whatever plans we had, we also had ADR's to deal with. I tried to incorporate them in the most logical way. (first day at Epcot we had lunch at Garden Grill, second day was dinner at Biergarten, we were already in the area both times) And the Studios, I couldn't really get a logical path in place, or maybe I had just given up by then.

You are going to run into the unexpected, it's pretty inevitable, a really long line or a character showing up or some other distraction (as ADHD kids tend to find easily) which will throw your schedule completely off-track. There's not much you can do except plan for it to happen, build in extra time, or make it so that there is catch-up time at the end.
Youngest DS really liked the park maps. Maybe someone who is going before you could send you some? Or if you call WDW? It wasn't a plan, but we could plot out the next two or three stops ahead and he could look at the map and give us directions.
You might also take a look at either the Unofficial Guide website or Bob (I don't know his website link but he's here on the boards) which gives very step-by-step touring plans.