Which is fine. Even with full BiS BoS gear it was still RNG dependent. I had one pull on Archimonde where I had a breath last 2 minutes and another pull where it lasted 20 seconds. It was also one of harder playstyles to play in WoD. The only real issue with tanks in WoD was paladin in HFC. Their class trinket made them do way to much damage and it was so braindead easy to play.