Thanks for all your help. I'm having about the same luck with this new hashtag strategy as I did before I started it. I have about 2,200 followers and my posts usually get 300-400 likes. Engagement has stayed about the same for two months or so, a bit of a plateau.
On the last post, I used 14 tags with 1m+ posts, 10 with less than 200,000 and 6 from 200-800,000.
I feel like the cascade effect isn't working. I've reached a few top posts in the less popular tags, but they aren't getting enough traction to get into the medium popular hashtags' top posts. Any ideas?