Let me start by saying I almost always park hop when using LLMP, and often get LLMP for AK. I've had very good luck using my 3 AK LL's then swapping over to booking LL's in another park, often MK.
1. I book my AK multipass LL's on the early side. Maybe try to adjust them for earliest times you can get/want. I tend to book EE, Safari, and Na'vi, then even pick up Kali, or skip it.
2. Booking a LL for Zooptopia is 100% useless. I don't say that because the wait is short, I say that because the standby and the LL merge almost immediately. With or without LL your wait will be the same, at least that is the current configuration. People were complaining, so maybe this will change. (The day I went there was a wait for Zootopia. It was recently improved. Not great IMO, but better than initial rollout.)
3. Ideally, you want your ILL return time for FoP to be after your 3 LLMP passes, so that by the time you are using it, you have already booked booking LL's in MK.
If you want to swap your 3rd multi-pass LL to MK you can, but I have gotten some very good MK LL's.