The tier 1 rides have been very available, especially early in the morning.
What I would do is FP+ 7DMT as early as possible in the day (during first or second hour of park opening) and then when you scan through I would book a tier 1 and 2 at HS and SDFP everything else at MK.
right now (1:33pm) at HS I can get the following SDFP
RNR 1:45 3:00 4:00
GMR 1:45 3:15 4:40
TSMM 1:55 3:40 4:40
F!
the popular tier 2's have good availability too
basically everything. Earlier in the morning there are even more times available. it's crazy how many SDFP are available!
THEN when you go to HS you have a tier 1, a tier 2, (prebooked from the app while you are MK) and I would get a SDFP for a second Tier 1 when you get there. I think this works especially well since you WANT later in the day FP+ at HS - there will be anything you want available from the app at 10 in the morning, trust me
At Epcot FEA is sold out but Soarin has 2:35 3:35 4:35
TT has 3:00 4:00 5:00
TONS