Just read through your whole report and all I can say is WOW! You have an amazing month coming up! Kinda jealous, I gotta say.
Paris is my favorite city in the whole world. I studied abroad there and my husband and I went for my birthday 10 years ago. Your itinerary looks amazing! A word of advice - you have a LOT packed into your days. Paris is huge and a lot of walking...I'd do what you do for Disney and make a list of the "must haves" - get those done first and hit everything else if you have time/energy.
We tried to just do 1-2 major sites per day. Then one day, we decided to hit the Eiffel Tower (3 hours there), walk to Napoleon's Tomb, walk to Military Museum and walk through every.single.exhibit, then walk walk walk some more.
Then we had a fight because we were exhausted and it was cold and raining and my husband got us lost.
And wear sneakers to Versailles, not flip flops like I did!
Have a great time! Can't wait to read all about your trip(s)! Did I miss what hotel you're staying at for your coming up WDW trip?