Bavaria Christmas markets itinerary

Hi! I have 6 days in Bavaria, and am trying to plan a christmas markets visit. These are the places I was looking at visiting: Nurember, Regensburg, Rothenburg ob der Tauder, Wurzburg and Dresden. Was undecided on Munich.

What's the best route for me to visit these towns? And is it too much to do in 6 days? I was assuming 1 day per place, which I know is probably not enough to see them well but that's all the time I have off work :(