I think you're just going to have to go where Maxpass takes you. Mid-day on Sunday can be a bit of a crapshoot - some weeks, it's pretty nice! Other weeks, it's crazy crowded! It's hard to predict where FP return times will be when you arrive, so it's hard to know which "order" of things to go with. Also, everyone's "highlights" are different - does that mean headliners? Just things unavailable at WDW? By the time you add in a meal at BB and the nighttime entertainment trifecta, you're pretty limited on ride times, and if they want time to just walk around and see stuff, that may be a challenge. Like, do they want to see Toontown because there's no WDW equivalent, or do they just want to hit some good rides (in which case, Toontown is not necessary, you know?)
A few ideas:
1. I'd think you want to use SR for both RSR and Incredicoaster, so I'd focus on FPs for GOTG (if that's one they want to ride?) and then anything over at DL that they want to ride. Space's SR is great, so definitely don't worry about FP for that one. This means that assuming GOTG is on your list, that's the FP I'd plan around... that's our #1 "must-do," and I often pull it around noon because that's where it hits in our typical visit, and our return times have ranged from about 2:00 to as late as 7:00, so that's what I mean by it's a bit of a crapshoot! Anecdotally, I also feel that GOTG is worth "refreshing" the Maxpass page for a few times - it seems to get more cancellation FPs than many rides do.
2. I'd potentially do most of Fantasyland at the end of the night, after Fantasmic, UNLESS it's looking not-too-bad when you get there. I'm assuming you want to do Pirates, so I might start there if you're doing DL first, or else I'd actually probably start at DCA, knock out those single riders and a few others there, and then head over to DL for your BB late lunch and do Pirates after that? I guess that depends on what time that lunch is for - if you can get a GOTG FP for before that, I'd probably do DCA and then head to DL for that lunch; if you can't get GOTG until later; I'd do DL first until lunch, grab GOTG whenever it's up for a later afternoon time, then head over to DCA later in the afternoon, single-ride RSR and IC, use your GOTG FP, stay there until PTN, and then head back over to DL.
This probably isn't your situation, but just in case: I walked up to decent F! viewing for the 2nd show a few weeks ago with no FP or anything. I'm guessing that dining at BB and having prime F! viewing are important to your group, but if it's not, I might consider dropping the lunch and just walking up to the 2nd show... much more flexibility, but also a bit more of a gamble, so obviously, that depends on your priorities. The night I saw F! #2, we bailed when the Mark Twain got halfway around, walked directly onto Pirates (and had a half-empty boat), walked directly onto HM, and then waited about 10 minutes for Indiana Jones at the end of the night, for what that's worth.
Here's hoping for pixie dust!
