what i would do is go early to the park and get as much done as possible.
try it without the ep.
use the single rider lines when you see them.
if you can finish the first park in 4.5 hours, then switch to the other park.
if you see line waits of over 30 minutes, go into one of the shops and buy the one park Express pass.
this will help you save wait time.
ex pass is not valid for gringotts/fj and maybe two other rides that are big hits.
i don't think dec 2nd will be a packed day even being a friday unless many choose that week so they can avoid the larger crowds that start arriving in the middle of the month.
if you do buy the p2p express, you can go back and forth between the parks.
but if you can do a lot in the first park, save the money
wait and see if you need it when you switch parks.
normally i would say that IOA would have lighter crowds but with Hulk going live again and Kong opening, they will be a big draw at IOA.
