Is Eldryon bugged? (Doom)

I have Eldryon 2 hexes away from an enemy. My Bellatrix is set to attack that enemy and shows the same damage amount as other enemies not in doom distance. Am I misunderstanding what "exactly 2 hexes away" means? Why isn't there a marker when I click onto/move eldryon showing his doomed hexes?

This seems to work on bosses/guild raids fine, which makes me think I'm misunderstanding the distance