If you see people leaving becuse of a boss, it's because of Dor'Lyn. What makes Dor'Lyn cause people to immediately leave on sight is that extremely annoying heal that pretty much heals Dor'Lyn back to full health. Tbh idk what triggers the heal it probably has something to do with the pools or something, but what I know for sure is that there is one guarenteed way of killing this abomination of a boss. Just use Korruption's AA since it rejects that heal.