Yes, it would be helpful to know more ahout the OP and his/her traveling companions. My guess, from the screen name and the time of year and the number of family members traveling, is that this is an Indian group who have done research in Indian travel agencies specializing in fast bus tours around the European continent. Which is definitely not the way to approach a very, very short trip to Europe in prime season with a large group of people.

IMO they should focus on two destinations and buyoen-jaw tickets. Let's say Paris and Rome. If they're not hung up o Switzerland, as so many Indian visitors are, let them drop that.

I've visited a whole bunch of cities in a few days' time, too, but not with 7 people! That changes the equation enormously. When my husband and I travel together we spin all over the place - even one other couple divides our touring time in about half.