Ayamiss The Hunter
After attempting and failing to solo this boss in AQ20 and looking it up in wowhead after that embarrassing failure, my understanding is that the permanent duration/impossible-to-cleanse stun coupled with instant kill “feature” was not supposed to activate in a pure solo encounter. I see no other threads on this forum but the wowhead page comments (last 4 replies to the top comment) indicate that I am not the only one to experience this bug.