Ugh, let me rephrase the question then, is this 34,000 blogs as in websites, or blogs as in posts? I assumed the former, but sounds like I might have been wrong since building a list of 34k niche websites would be next to impossible.
I am guessing you have added everything from here:
https://news.ycombinator.com/item?id=36575081
and the subsequent site that offers the OPML for those blogs: