I'd like for the Dark Knight to be the absorption tank. We have the high health mana sponge in the Warrior, we have the Blocker in the Paladin. I want the Dark Knight to have relatively similar health to the Paladin, but using an Absorption Shield instead of an actual Shield. SE said that they're more magical then the other tanks, which could be from the animations to actually using more MP then the other tanks, but I really dont think they'll be a MP heavy class like some people are saying.

I don't think they'll be sacrificing health to deal more damage like original Dark Knights, as that would be a bad design for a tank. Instead I could see them building up a temporary shield through a combo, that will either mitigate damage or for the "health" draining abilities of a Dark Knight be consumed instead of you actually using health. Obviously the damage of these abilities without absorbing a shield would be pretty meh, and they'd have a cooldown to give them a hefty Shield right away for when they need it. I'd also really like if the Dark Knight excelled at AoE Tanking, and doing a fair chunk of Damage.

The way I imagine it, the Paladin is the "main" tank, and the Dark Knight is the "off" tank and the Warrior would be a balance between the two. Able to fill either role.