Getting refused to EX groups as a DRK

[BadRNG]

You keep saying this, yet it's not true.

DRK is a better MT than WAR... well, shouldn't say better, but has more overall mitigation. A good player of either job can perform well. Though most healers I've been with say they'd prefer to heal a DRK over a WAR because they think WARs feel squishy.

Maybe it's because those WARs are stance dancing and doing it poorly?

Better mitigation in what way? Nothing in DRK's toolkit compares to having IB up for every tank buster, the only real threat to tanks in the game. That is what people mean when they say WAR is the better MT, because as MT the only things that should be killing you are the big hits and WAR is incredibly good at eating those.