I had to travel whole West bengal (from South to North, Kolkata to Siliguri).
If you like you can visit once Latpanchar (https://www.darjeeling-tourism.com/darj_000128.htm). I will try to help if necessary. Srikumar is also planing to come in December.
People are very known to me there. I will go again 2nd week of October if not earlier.
Fire-breasted flowerpecker (10)