Upvote:3
With 5 days for each city you will not be able to see all the places you listed. Especially if you don't have your own car.
For example in Italy, you listed some places which are on opposite sides of the country, in some cases it will take half a day just to reach your destination.. Same applies for France. From Paris to the Mont Saint Michel it's a very long way with public transports. You should take a train to Rennes, then from Rennes a bus to the Mont. The visit itself could take more than half a day.
So, in summary: with such a short stay I would concentrate on things to visit in Rome and Paris, and leave the rest of the country for a future travel. Otherwise you will not enjoy your stay, you will just run around and don't even see what the 2 cities have to offer.