I noticed that the number of spheres Calliope collapsed to form the black hole, 3, also matches the number of leprechaun planets that didn't survive Caliborn's First 8r8k. I think there might be some big connection there, but I am not sure what it would mean. Any ideas?

I’ve been looking at that scene for a while but I don’t quite see any significant connection. It may have to do with another group of threes, but I wouldn’t be able to tell you WHAT exactly. Three Sessions? The Holy Trinity? It may also be an arbitrary stylistic choice.