Originally Posted by
Alberel
The final boss of the Vault is really a healer check. Yes, the mechanics require everyone do their part, but the healing in that fight is quite a lot more intensive than prior content required. Whenever I've had problems clearing that fight in the Duty Finder it's been down to a healer that was either massively under-geared or didn't know how to heal properly because they'd never actually had to.
Now, if the deaths are actually being caused by people just being stupid and not dodging anything... well yeah there's nothing you can do there. Just vote abandon and re-queue, or better yet find a competent healer to queue with.