We usually do Magic Kingdom first because that's our favorit park and we usually just can't wait to get there!
This time around, though, we're going to AK first because we're trying to do the parks on the best days per touringplans.
We're not doing DHS this time, but usually when we do we do it on the middle day between MK and EPCOT because DHS is usually a shorter day for us and MK and EPCOT tend to be our really long/tiring days so we don't do them one after another.