Well, I'm a planning nut and I've done my own schedule for Christmas '04 already about 6 times so I'll give a shot at yours, lol.
You don't say but I'll assume for this purpose that you are onsite and have kids.
Wed: EE at Epcot, stay til tired, pm at MGM w/Fantasmic
Thurs: EE at MK, stay til tired, pm at Epcot or cruise for Illuminations.
Fri: EE at AK, afternoon of swimming at hotel, Luau at 8pm but arrive at Poly by 6:45 to view Wishes from beach at 7:15 (approximation given park hours from last year), then walk to Luau cove.
Sat: EE at MGM, afternoon break if needed, final night at MK.
This is what I would probably do. If you aren't an early riser or onsite, then you should not go to the parks with EE. I realize MK is very crowded Saturday nights but we always begin and end every WDW vacation at MK. You should hit your favorite on your last night. I'm not big on parades but like the fireworks in the parks. Ok, I think that answered all five of your questions, lol. I believe they do show Wishes every night.