The title says it all. I'd like to know what my options are to get from Switzerland to Nashik, Maharashtra, India by public transport. The only option I could find was to fly from Zurich to Mumbai and then take one of the slow trains. Are there any other, in particular faster, options?
In the absence of answers from people who actually know something about India: I assume you have already checked Rome2Rio on this and found that basically you can fly to Mumbai (or Pune or Aurangabad, in that order of preference) and then take the train. What I found suggests that this is your best option.
An airport is not listed on Wikivoyage and Wikipedia reveals that the Nashik airport now essentially is an army base. There is another airport in Ozar close by with a new passenger terminal but there seem to be no flights going there yet and Google reviews affirm my view that it is not yet in operation (at least for passenger flights).