We're doing the same thing -- an AK morning with no FP+, so we can save them for another park later. You are absolutely doing the most efficient thing by saving your FP+ for HS.
For what it's worth, here is our half-day touring plan (Note that it's for Wed., 5/7, which has an EMH, so we'll be arriving about half an hour before the 8:00am EMH park opening). I've run it through touringplans to ensure that we can get it all done in this time frame, even with a "slower than average" walking pace. Of course, it does not cover everything. Notably, there are no meet-and-greets and we're not visiting Rafiki's Planet Watch, etc.:
[Arrive at rope drop.]
(1) Kilimanjaro Safaris
(2a) Adults: Pangani Forest Trail (gorillas) and Maharajah Trail (tigers)
(2b) Kids: Expedition Everest (x2) and Kali River Rapids
(3) Everyone meet back up about 9:45 am for “It's Tough to Be a Bug!”
(4) Dinosaur
(5a) Adults, if desired: Primeval Whirl
(5b) Kids: TriceraTop Spin
(6) 11:00am Finding Nemo or 10:30am Flights of Wonder
[LUNCH - Flame Tree BBQ or Yak & Yeti]
(7) 12:00pm Finding Nemo or 1:00pm Flights of Wonder
[Leave park, stopping to peruse Discovery Island exhibits as desired.]