joanens
You may have decided that you are definitely getting a rail pass, and if so I wouldn't want to have you feel negatively.
But if you are only doing 6 trips you may very well be better off not.
If your country list is the order of your journey, could you possibly be planning something like
Train Day 1 - Paris to Munich.
Train Day 2 - Munich to Innsbruck or Salzburg or Vienna
Train Day 3 - that Austrian city to Venice
Train Day 4 - Venice to Florence
Train Day 5 - Florence to Orvieto or Florence to a town in the Cinque Terre
Train Day 6 - Orvieto or Cinque Terre town to Rome
If so it is unlikely that a pass would save much or any money or aggravation if you are able to commit to specific trains like you would commit to specific flights if you were flying.
If you are far enough out that you can benefit from the extraordinary deals available with a little work on the national railways for each country websites you can save wheelbarrows of money and aggravation.
A pass in France will require a separate purchase of a reservation, quota controlled.
If you buy your tickets in France (or tickets ahead) you can get really good prices and the reservation is included.
The same is true for every leg of a journey in Italy which is not on the very slowest of trains. Often a low priced advance ticket on the high speed trains is not much different in price to the pass-holder mandatory reservation fee, and you have a day of pass use on top of that.
If you are open to us helping you work through the differences for you could you please post the dates, times of day, and origin/destination for those 6 train days? If the railpass is better for you we will say.