To answer your more sensible question, I do not know how many of us remain upon this world. Since my release, I have resumed connections with the closest of my allies, and sent my agents to observe my enemies - but we Mahjarrat are accustomed to the shadows, and the mortal eyes I must use to search for my kin are not. I have discovered that many of us have entered the death-sleep, and that Mizzarch, Lamistard and Ralvash were the most recent to face the void in the Ritual.
I KNEW i saw that name before:
CE Postbag Puzzle
Ralvash is gone; Muspah, famous, sleeps with the fishies, if fishies frozen could be. That's where the shadows are shadowed, and even the delvers don't dare. Bizarre: one day it's almost time for a shadow to shift - and a shadow to open its unblinking, empty eye.
So Ralvash is/was a Mahjarrat.