Yeah, with glyph of kilrogg, use your eye of kilrogg where I'm standing, which is at the southwest edge of the encounter area, against the invisable wall.
Turns out it works for blink too.
Then run forward about 20 or so yards, then drop an demonic circle. seems like if you don't move far enough the circle won't spawn where your eye is.
EDIT: HAHAHA, holy hell, unrelated, but I was exploring in an lfr raid that was bugged, and somehow I got leader while exploring, had a raid of 20 port to me while I was outside in undeveloped land, funny stuff