This is what I would do:
Be there EARLY at AK, for rope drop- the whole shebang. We have been able to get a lot done at AK even after arriving past the rope drop. Especially during the time of year you are going, things won't be as crowded. Get as much as you can done and do it effeciently.
Make sure you start heading out of the park by 3ish. So save time, I would take the bus to the Beach Club or Boardwalk and walk through the International Gateway.
I always allot 2 hours for any table service dining. It's hardly ever more time but when it's less, it's never a bad thing.
Then, again to save time, I'd take the bus out of the Beach Club or Boardwalk to MK. And you should get there by 6:30-7 for Spectromagic.
It's all entirely doable. But don't sweat it because AK will always be there as well as Le Cellier and Spectromagic- if something if cut short or missed it won't be the end of the world... I hope.