FWIW, here is what I am planning for opening weekend.
We are there almost the exact same days (May 25-30). I will be with a twenty-something son who has never been to WDW so that influences my choices. More energy than a young child, seeing everything for the first time, and more interested in thrill rides than Dumbo LOL.
I think it best to plan AK for two days. Well, one full day and another half-day. We only have the May 27-30 for that if we want Pandora open which I have decided we do. So...
Thursday - half day MK - we get in late Wednesday night.
Friday, May 26 DHS - we can finish early and not have to expend as much effort walking as at MK or Epcot. Thus we can get back to the room early and rest and get to bed early for AK.
BIG DAY! Saturday, May 27 AK - bite the bullet and just do it. It is an 8AM EMH and we can do EMH although in general I rarely do EMH. Be at AK at 7AM to rope drop NRJ or FoP and FP the other. Stay all day as long as we can and try to hit all of the other normal AK things.
Sunday May 28 AK - not an EMH day at this point. We will sleep in and take a (mostly) rest day after three straight park days. Get FPs for NRJ or FoP in the evening, plus RoL and come back at maybe 5 or 6PM to focus on Pandora and RoL.
Monday-Tuesday (Epcot/MK)
