I would go with what rides and attractions you want to see most. Minions tend to have the longest EP line and suggest you do that first one of your days. I'm assuming you have park passes for most of your days, so you have the ability to explore both WWoHP areas at your leisure if you do EE.
I also suggest that you look at historical wait times for each of the days you go to the parks to help you plan. 12/24 will likely be the least busiest day with 12/26 being the most busy, like red alert busy. You can check touringplans and theDIBB. Busy scale out of 10: 12/21=4, 12/22=4, 12/23=7, 12/24=3, 12/25=8, 12/26=10.
My family will be staying at RPR from 12/25-27 and unbeknownst to my family yet, my plan is EE for USF Day 1 to be sure we do Despicable Me & Gringotts, then either continue to hit up USF rides like Transformers & Simpsons, or more likely take the HE to Hogsmeade in IOA and ride Forbidden Journey, Skull Island, Spider-Man, etc.