Need Suggestions in Choosing Which Day for AK, HS, & Epcot

[Alice777]

We are going to be in Disney World in December 12 (Monday) Though December 17 (Saturday). We arrive very early on Monday so we decided to just do Disney Spring and relaxed and have dinner at Coronado Springs.

We have wedding to go to on Thursday so that day we can't do park and there's wedding guests/friend meetup at Magic Kingdom on Saturday. This leaves Tuesday, Wednesday, and Friday for AK, HS, and Epcot.

My questions is any one the 3 parks more busy on certain days?

We need to buy tickets soon and want to reserve parks days. Any suggestions is much appreciated.

Tuesday: Which Park?
Wednesday: Which Park?
Friday: Which Park

Thank you