I got 80K in currency by doing several things:
1) Checked in as frequently as I could around work with shorter quests, did 1 hour quests when not grabbing tokens when at home, especially Jessie and Goofy 6 min quests, and then calculated the times for the longer quests over night (eg. Mike/Sully 6 hour quest together earned more EC than their 2 separate 4 hour quests, etc.)
2) Bought the parade float with my gems immediately and ran it constantly
3) Placed in the top 10 or higher on all trophy mini events to get extra EC.
4) Didn't level up my event characters past level 4/5, knowing that I had plenty of time and magic to do it post event, allowing me to do shorter quests for honey dippers/combs and get the EC, even when maxed out on the items for the books
5) Bought a bundle for Tigger early to get EC, a concession stand that gave EC, and Tigger of course. Allowed me in my own way to say thanks to the interns for keeping the game going.