If your focus is SWGE, then definitely do that park first. Because you might want to go again. We did RotR last week on Friday and had to do it again on Saturday. There was just no way we were going to leave WDW without doing it twice, if at all possible. And we got early BGs both days, so it worked out well for us.
FoP (I assume this is what you mean by FPO) is a must-do ride and Animal Kingdom is still my favorite WDW park.
You don't say how many park days you have planned at WDW and if you have hoppers. These are important considerations. On the 2nd day we rode RotR, we hopped over to DAK after we were done. Something else to consider is if DAK is open at night when you're there, because it's really beautiful there at night and also both Pandora rides often have not-bad lines very close to park closing, when the posted standby wait times are highly exaggerated.
This doesn't exactly answer your question, but maybe it's of some help anyway! BTW, I usually go to WDW twice a year. This just-concluded trip (we got home on Monday), we did RotR twice and rode FoP 7 times, all on FP+s, several of them procured the day we rode.
A year ago I would've said if I had to skip one park, it would've been DHS, even though I love TSM. Now my missable park--if I had to miss one--would be Epcot or MK (I'd have to decide between missing HM or missing Soarin').
Also, there's a great ride right outside DHS--the Skyliner. You can take a quick trip on it, just ride it from DHS to the hub and back or even use it to go from DHS to Epcot, which requires changing at the hub, but the system moves very quickly and it's a fun ride.
Edited for clarity.