Well at least they've solved 'how to summon a succubus' problem. To find the esoteric one must use the esoteric, our /vx/ is nice.
And having more sources never hurts.
Got a few suggestions for you, the trick is trying to find niche boards with a particular interest. I will throw a few that I know of your way, you may start bumping into new stuff as you go.https://8kun.top/fringe/index.htmlhttps://8kun.top/x/index.html
did some digging around other places like 9ch and such but found nothing unfortunately. As well as 22chan.
there may be something of your interest in the webring perhaps?