First of all... let me share my disclaimer. We just got back from a great trip from 3/15-3/20 and we skipped AK. My kids are 8 & 4. I had FP arranged at 60 days, rearranged the week before we left and then we changed some the night before on the app while we were there. So... things can change. And we didn't use most of our FP. Also... we used advice I'd read saying to stay away from the park with EMH since it is the most crowded for the day.
Day #1: HW morning used Toy Story FP and did everything else without. Wasn't interested in ToT or RnR, but I'd get those above all else. Especially with an early arrival... just get to what you want to see early. But, Toy Story was already 40 mins by the time we got through the gates at rope drop.
Evening Day #1: Hopped to Epcot around 6 after dinner and rest at AoA. Without FP and skipped most of Illuminations, we rode everything I had FP for the next morning, so we rearranged for Day#2. Rode Soarin' with a 10 min wait!
Day #2: Epcot: FP for Test Track (best), and didn't use any others. I would do the Space one if you want that one and possibly Soarin if you want to fit that in.
Day #3: MK: focused on Fantasyland and entered 15 mins after rope drop. FP were used everytime today! We got Storytime with Belle, Dumbo and The little Mermaid ride. The only one we "needed" it for.... was storytime... cut the wait to 10 mins versus 50. The other's we did twice since there were short waits...10 min long. Rode most rides early when waits were 20 mins or less.
Day #4: MK: Got there 10 mins after rope drop, focused on Tomorrowland, FP Buzz but rode it with a 5 min wait without the FP and the kids didn't want to ride again with a 10 min/fp wait. FP for Space Mountain which saved us 15-20 mins. FP Speedway which we did without the FP... wait was 10 mins.
Day #5: few hours before departure... got FP for Toy Story at HS and used that.
This was spring break time... the parks got very crowded, especially the MK by around 11am and we tried to get the "must-do's" done and other ones we saw short times for asap. We used Disney's app and
Undercover Tourist's app and also Touring Plans app to help us maneuver. (Like a surprise 15 minute wait for Pirates) Know that you can report anytime in that hour window of your FP to use it, so we often rode others that were really short on our way there.
Good luck.