Italy to Sicily to Paris?

Hi,

I am going to France, Switzerland and Italy this fall. I will be arriving in France at CDG. Then after a week heading onto Switzerland and Italy with the second to last leg being in Tuscany. I would like to avoid driving down three hours to Rome to catch a flight to Sicily the last portion of my trip before heading home to the USA via Paris to catch my connecting flight. Here are my questions.

1. What is the best airport to fly to Sicily from Tuscany: Florence, Pisa or Bologna?

2. What city is the best to land in in Sicily: Palermo or Catania?

3. What is the best city from Sicily to fly into Paris from?

Note: Should I do an open jaw? Is it cheaper that way?