Hi XYZ, hey guys,
can someone expert of Herobot advise me?

I'm desperately trying to build a Dragonite without sniping (not safe). One month ago I succeeded easily, running my necrobot in Pier 39 and Fisherman's Wharf, with 400m max walking distance. There were a lot of Dratini there, so no problem, I had plenty of candies.
Now I don't manage anymore..after a few days, just 45 candies. I rarely catch a Dratini now. I wonder why. Is it the "nest" (I know it's not really a nest) that changed or how Herobot works compared to one month ago Necrobot? Sure I was catching pokemon at a very fast rate (not safe! I got banned), is it the only reason?
Can someone suggest a nice way to build dratini candies without sniping? A safe way.
Thank you all (especially XYZ), Herobot is AMAZING!