How does the Dragon Lair damage work?
I'm on Dragon Lair 19. I go in with a heavy cleanse/sustain team, but after about 4 rounds where he gives you the evil eye (whatever that ability is called) he just one-shots everyone from full HP. Also, he was 1-shotted my MM with full HP pretty early on. I have read the dragon ability tooltips, and there is no information about damage escalation or damage based on max HP.
There is clearly something secret going on behind the scenes here. None of the popular guides talk about this. What gives? How many rounds do you really have? It seems that this is a gear check DPS fight rather than a sustain damage fight.
Thank you for any help.