Not finding DRK squishy at all.

[Hundred]

DRK doesnt have as much passive mitigation as the other tanks while not having all that much more active mitigation.

Players can't magically make the DRK have as much mitigation as the others.

Wtf are you talking about. Passively the mitigation is nearly the same except for PLD's shield.
Warriors 10% Parry on Defiance is irrelevant. Even in the BEST case scenario where 10% Parry is 10% increase in parry rate out of 100%, that Parry is fixed at 20% mitigation means a 10% chance to mitigate 20% damage, is a 2% increase in mitigation. "Well thats 2% Drk doesn't have" Except thats 2 % built up over 8 GCD's and then spent and rebuilt, aka Its not actually 2% mitigation at all, nor can a healer even FEEL this because we're talking such an irrelevant amount of mitigation that randomly occurs.

Its not even worth discussing their mitigation passively. Pld will always have the advantage, and warriors is irrelevant.
If your comparing their toolset up to 50, PLD do not have an equivalent to Dark Mind, they do have awareness (But lol its awareness), and Sentinel is 10% more potent then Shadow Wall. Dark dance has a vastly shorter cooldown then Bulwark.

[Faytte]

Passive mitigation is similar, Paladins are in the lead (shield is awesome).

Active, Drk trade defense for offense while tanking--if they gain more tankyness, they should loose some of that offense (If they say, tanked as well as a war overall--id see there being an issue between them and warriors). So, they are nifty, they might be able to do all content, but it wont be what people consider ideal cause the only people that care about tank dps.....

...are tanks....