Here's what we RDed (stayed on property, RIV and BLT);
MK - TBA (rode it twice in rapid succession). We did not ride Tron but could have had we wanted to wait over an hour. We chose to do other things twice instead. We saw all the shows and had dinner at CRT to give you an idea - we had time.
DHS - SDD. DW will rode SDD but not RnRC or ToT but honestly I think both of those in that order is the better RD pick.
EPCOT - TT3. If you can be on the rope at RD then maybe GOTG, but that one takes a while even if you are first on and you want to get to a 2nd ride in the first 30 mins if you can. Frozen is my next priority because that line crawls once the LLMPs start filling in the line. Just know you will be waiting for GOTG for however long that might take - for us it was about an hour.
DAK - Everything but the 2 rides in Pandora. You can ride them all in about an hour including walking but you have to skip Pandora. Note that Safari opens with the regular park, not EMH so come back to that one.
Pandora ride lines peak before noon then steadily decline was our experience. Just know you will be waiting for those 2 however long that might be. We did that and we were in our car on the way back to the resort pool by 3 but did not see any shows (walk back to the car dang near killed us - it was HOT!).
Used the regular line for everything first go through, but don't forget single rider lines! TT3, RotR, SR and RAT were walk-ons in the single rider line. DS had good luck in the RnRC single rider line but we've gotten stuck in a longer than standby line on that one.
Afternoon break is my new must-do. We always go in August and yes, it is hot. We saved money by planning on eating lunch in the room (and breakfast before we head to the park) when the heat got bad and we started to drag. Pool was open most days but we also waited out a thunderstorm in the room one day - better than getting soaked in the park.
Don't forget night EMH either. Monday in EPCOT, Wednesday in MK - took advantage of both.
Fresh Baked just did a WDW trip and tested some RD standby strategies if you want to look it up on
YouTube - pretty similar to what we did honestly.