Meh, I don't know. It's questionable. I think you would have to basically be standing at World Showcase Plaza and the second Illuminations ended be booking it to the monorail or bus. There tends to be a bottleneck through future world when Illuminations lets out. Even if you did manage to beat the crowds to the monorail and get into the Magic Kingdom what kind of spot are you hoping to get to see the parade? If you had FP for the parade viewing it might work.
I too have seen Illuminations at 9 pm and been on Main St in time for 10 pm Wishes.
Getting there in time for the 11 pm MSEP will be no problem at all.
It's usually no problem to get a spot for the second parade, even at the last minute (outside of major holidays). Main Street will be busier, but if you go to Liberty Square or Frontierland, you shouldn't have a problem finding a place.