We recently did rider swap using LL and even then it took about a full hour for both groups to finish, maybe even a little more, since there is the preshows, and exiting to the gift shop etc. first group not riding just waited around in the shade for about 35 minutes, then 2nd group not riding looked in the gift shop and stayed there until everyone was done riding.
I don’t know about your group, but my group didn’t understand the need to hustle it in the morning for early entry. One wanted to leisurely finish breakfast, another thought we were walking too fast, etc.
For slinky dog I knew my mom couldn’t walk fast so I told my husband and son to go on ahead of us, and even just the two of them kinda rushing, slinky was 60 minutes wait right at 8:30. Only A few seconds later it jumped up to 90min. Only the two of them were riding anyway so it didn’t make sense for the rest of us to rush with them
I would suggest to actually just get the LL for FOP. It’s just too unpredictable with the times and you could be waiting longer than you want in pandora. As stated above, that you need to set up the rider swap will delay you greatly. And plus you could get there early and the ride could be down. I had a lot of down rides and sometimes it’s hard to pivot if nothing is close by with a short wait. I didn’t want to spend the extra money either on the LL but in the end glad I did.