we always do each park for emh at least once, MGM twice ( just to go on tot and rnr second time then we leave) we get to do lots so that by the end of the morning we can kind of kick back and smell the roses the rest of the day, doing less busy stuff, shopping ,snacking what ever we want to do. last time at Mk we did the mts , buzz 2 times in a row, fantasyland ( except magic carpets and dumbo)and i think pirates/ jungle cruise before lunch. we do go off season so we never leave that park ( except MGM) as crowds are not an issue
can't say about peak season but imo it's the best way to go off season. occasionally we wil redo a big ride like rnr later in the day if the lines are not long but if they are we can cruise on past knowing we already did it. i do not think we have waited more than 15 mins ever for a ride our past 5 or 6 trips except a show or two that just started and we didn't want to leave and come back.
if ee is part of emh i'd do ak but it was the only park i don't know that it is worth it. i love the safari early, saw ttbab with no wait but that was about all that's open ( maybe dino...can't remember if we rode that right after emh or during)