It depends on your itinerary and travel style. You might do better booking each leg just a few days in advance. But you’ll need dependable wifi along the way, and probably access to a printer for most tickets. As an alternative, you could book your next trip on arrival day in each city.

Depending how many days you want between your itinerary locations, some just don’t make sense to use a railpass day. Par-Lon for example is Eurostar which don’t honor rail passes. And Ams-Rotterdam, Rott-Bru, and Bru-Par are such relatively short train rides that burning a pass day for each just wouldn’t make sense, either.

I’m assuming you listed your itinerary in order… so Barc-Rome would be best with flight hop. See Whichbudget and Skyscanner.com. That just leaves Italy, Hungary, Austria, Germany… and rail prices there can be reasonable.

Have you tried our Railsaver for advice?

In most cases discounted tickets will be gone a few days in advance; specials are typically for purchases made weeks in advance. For short trips, buying point to point will often be cheaper than using a pass day, but like Don said it will depend on your travel style and itinerary.

The trip planner recommends a 10 day global pass. That’s the best general recommendation you’ll get. You won’t know what would have been cheaper until your trip is over. The trip planner uses a formula based on distance to guess the standard fare for the routes you’ve put in. You’ll have trouble beating those prices unless you can book (and as Don notes print or pick up the tickets — which can be a problem) well in advance from the individual national rail company websites. Some of the national websites don’t take non-European credit cards, others only sell tickets for specific trains and some don’t sell international (one European country to another) tickets. That makes the on-line as you go style difficult.