I think EPCOT is best - If you can park hop, not sure when it will be back as an option, I would do AK in the AM, and EPCOT in the PM
Fastest way to do it would be a Minnie Van or Uber between Parks
Other option is to take a YC/BC, S/D,or BW bus from AK to the resort and then walk or boat to EPCOT.
You could always eat lunch at a resort before doing EPCOT.
Third way to do it - bus to AKL - eat lunch there and then bus to EPCOT from AKL The bus ride to AKL from AK is only 10 minutes.
Just a suggestion