We posted this in AA, but was suggested to re post here:

Two different questions: 1-Which cities you suggest to visit from below list, and 2-From these cities any easy way to get to Berlin:

On these codeshare you cannot got directly to Berlin.
1-Which other cities you would suggest looking into for a 3-5 days stay ( but not Munich or Dusseldorf)?
2-Would there be a sensible way to get to Berlin, or near to it with this codeshare from the following ciites?

The following are available per AA: Bonn, Cologne, Dortmund, Dresden, Dusseldorf, Erfurt, Essn, Freiburg, Goetingen, Hamburg, Hannover, Kassel, Leipzig, Mannheim, Munich, Nuremberg, Stuttgart, Wurzburg.