In theory, there are two ways. Damage shield and just big resists. But the shields are weak enough and even dragonknight is unlikely to be able to do everything. At that time, resists... I think a thing called Ironblood will kill you more than it will help. I have a mistform tank, but also not able to tank everything unless you have flawless reflexes and 0 ping.
It's like it's completely useless for pve tanks. Really, what can save this thing?