For Fastpasses, here's what I recommend.
Pick 3 attractions at each park that you want to see! Then, do the following. For the following example, let's say you're visiting Magic Kingdom and the park opens at 8:00am. Let say you go on a day without EMH.
If I decided I wanted to experience Space Mountain, Splash Mountain and Big Thunder Mountain with Fastpass, then book the following:
Space Mountain: 8am-9am
Big Thunder Mountain: 9am-10am
Splash Mountain: 10am-11am.
What I did last summer is we rope dropped Seven Dwarfs Mine Train and a few other Fantasyland/Tomorrowland attractions and caught Space Mountain near the end of the first window. (If you're running behind, don't worry. There's a 15 grace period). Then, we did more attractions and caught Big Thunder Mountain at around 10am and did Splash Mountain right afterwards and were finished with our reservations by 10:20am. Then, you can go ahead and book extra fast passes!
Your reservations can't overlap whatsoever, so 2 hours (and some change!) is the earliest anyone in the park will be finished with all three of their fast passes. So, at around 10, there will be a ridiculous amount of Fastpasses left for the rest of the day. Especially with 2 people, you'll be able to find plenty of reservations. In July (it was packed that day as well), we were able to get an extra 8-10 fastpasses after our initial three. We were a party of two also.
And then, if you choose to go on a day with EMH, use that time and then pick up with this plan once the park opens to all guests for the day.
But don't feel too pressured to go through everything at light speed! You have two weeks, so take it slow and enjoy yourself.