Originally Posted by
b1513
I would spend all my time in Paris and, if you want to see another area, take day trips. For example, a day trip to Bruges, Belgium or Brussels would be a nice day trip.
While not impossible for day trips, Belgium is a little far for convenient day trips from Paris and would suggest something much closer instead such as Reims, Orleans or Rouen as mentioned.
MHO to OP would be to drop one of the 3 destinations mentioned perhaps leaving Bordeaux as a day long stop between Nice and Paris. I find that packing and unpacking several times during a shorter holiday is a pain and the less I can do it the better.