We have visited all the places that you list above and they are all good places to visit.
We have a tour/Nile Cruise booked with Gate 1 for Egypt in Jan. Looking forward to it. Price is great. We booked all the optional tours.
I don't know the details of these optional tours, but St. Paul de Vence is a must, we love that place.
Monte Carlo is Ok, but you probably should do it anyway. Montmartre is good, what are your options if you don't do the tour. You could go on your own, but you will still spend $$ taking the METRO or taxis.
Versailles is a must as well, we did it on our own taking the RER and METRO from CDG airport. Hang on to your wallet and valuables, pickpockets are terrible on the RER and METRO. I know we took a tour of Versailles provided by Versailles, but don't remember what we paid.