Usually when I see TT I think Test Track (at Epcot) but I think you mean Tower to Terror (usually I see ToT for that).
I am in the same boat as you. I have gathered that while G+ is in the current state of operation I will be better off trying to get my first G+ (I will call that G+ #1) that has a window opening before the 2 hour after park opening rule kicks in. So here is the strategy I plan to follow:
- At 7AM try and get G+ #1 with a window that opens before 11AM (the 2 hour point on my day)
- Use G+ #1 before 11AM so I can book G+ #2 before 11AM after I double-tap
- That should allow better access to G+ #3 before 1PM (the 2 hour rule after G+ #2)
Like me, it sounds like you will not try to get SDD with G+ #1. Since that appears to be by far the most popular choice for #1, that gives you and me an advantage over many other G+ users.
Here was the heat map from yesterday at Thrill-data...
https://www.thrill-data.com/waits/park/wdw/hollywood-studios/2022/03/03/2022/03/03/False
Based on this data below it shows that MMRR was the least in demand of the three you mentioned and I would guess the most likely to have a G+ #1 available in the first 2 hours.
Two screen shots of the same data. One for all day and one only for early day when G+ usage is most critical.
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