Need help for Switzerland-Italy

[KB]

Hi all, I will be going to St Gallen this may. Will like to travel to Italy as well and my schedule goes like this:

St Gallen - Venice
Venice - Florence
Florence - Rome
Rome - Zurich (Most Prob will require a sleeper)

Is the Eurail 5day flexi pass the cheapest option? I have only 4 days of travel so will like to ask around if any can suggest a cheaper alternative?

Eurail Youth Pass cost $249USD while the Italy's 5 day pass cost $190USD but I will need to pay for the Rome-Zurich and St Gallen-Venice trip, so it doesn't seem to make much sense.

Advice from the seasoned travellers appreciated!

[nitsansh]

Did you check the cost of P2P tickets?

Travel in Italy is not so expensive... Venice to Florence and Florence-Rome should cost about 30 Euro each...