Have you looked at the “trip feasibility” feature on your Eurotrip Trip Planner?
I am not one of those people who says nobody should ever cram their trip, but from beginning to end you have way, way too much travel time.
Just about every single leg of your trip is at best, difficult, but April 6-8 and April 21-22 are especially problematic. Venice, Milan and Pisa in two days? Amsterdam to Brussels to London and then back to Dubai? And then there is your April 14 arrival in Budapest, and the very next day, your departure for Krakow. Why bother going to either one if all you will see is a train station or airport?
You don’t need more than 2 days in Venice, and you could probably just skip Milan unless it is very important to you.
I suggest you skip other destinations, as well. You simply have too much going on, with no sightseeing or down time.

One side of me (and I AM one of those people who routinely suggests a slower pace) agrees with Cil. Just reading the itinerary was exhausting. If you aren’t totally rested when you Start this, you’re probably going to get sick at some point. Hopefully you can stave off physical illness until you’ve got time and inclination to sleep it off on the beach in Dubai.

The other side, sees that Chemron’s gone to the effort to plan this out and KNOWS 1/4 to 1/2 of all waking time will be spent en route to airports and train stations, in airports and train stations, on airplanes and trains, dealing with tomorrow’s travel logistics, getting oriented in a new city, and packing, unpacking and dealing with getting settled in new digs. I still think it will be stressful and physically and emotionally exhausting enough to actually result in illness, but if that’s what you want, “GO FOR IT.”

I have to agree — the pace is craaazy. But if you know what you’re getting yourself in to, ok then. But I also think that nobody really knows what they are getting into until you are there. If this is not your first trip, and you know the deal, then good for you. But, if you haven’t traveled that much yet, you may be in for a surprise. At lease be open to slowing it down.