I'm with Kimberly. 1 full day at MK and 1 full day at Epcot and I'd split animal kingdom and mgm. I'd try to do it on an Extra magic hour for one of the parks so that way you'd have a little more time. Fantasmic is my favorite out of all the fireworks shows and I wouldn't want to miss it though I could probably skip everything else in MGM without shedding a tear.