It all depends on how hardcore you want to go with your touring...commando style or relaxed. My family is pretty relaxed about our plan, but we go all day/full days and love it! For our next trip, we are planning:
Day 1/Arrival: Epcot, end day at MK (My kids, 14 and 11, aren't huge Epcot fans)
Day 2: AK
Day 3 & 4: Universal both days, probably have a break with some pool time thrown in there as well.
Day 5: HS
Day 6: MK
Day 7: Discovery Cove
Obviously we have some other parks and things on our agenda, but realistically, if we weren't going to Universal, those days would probably be a rest day and another MK day.
Happy travels!!