Shadow wall needs an additional effect.

[Noxifer]

DRK already have -20% damage taken from Grit stance (same as PLD with Shield Oath)

WAR dont have any kind of reduced damage taken while on Defiance.

T_T I'm so tired of this misconception. It's also used in the STR vs VIT debate, where people argue that since WAR have such high HP pools, they can go full Strength and still have as much HP (or more) as a full Vitality PLD/DRK when they're in Tank Stance. Completely forgetting that the larger HP pool (together with the healing boost) is our Tank Stance bonus to defence...

(Of course, the bonus to healing received doesn't work with all healing, like the re-made Lustrate or some of the new instant heals, I forget which. And there's a slightly higher degree of overhealing since we have a lot of self-heals going on. But it's still our 'tank defence'.)