"Your Exorcism causes an additional 20% of its damage over 6 sec."
I never really used it, cause the first time I used it, the dots didn't do the 20% it said. I never thought more about that until I read on Elitist Jerks that it is supposed to be better than Glyph of Crusader Strike.
So I went to a dummy and tested it. It's 20% of the base damage, not the actual damage. It doesn't matter how big a crit you get, you still get the sucky 404 ticks (or 525 with inquisition). How can Elitist Jerks see that and say "Hey, this glyph has a cool tooltip, so it must be better than Glyph of Crusader Strike"?