Am I missing something about DRK?

[Faytte]

It's 20s with a 60s recast, so it can literally have a 33% uptime.
I love Dark Dance. It's RNG is compensated by that uptime.

This guy gets it. Your defensives on Drk are quite...QUITE good. There was a bad impression of the class cause honestly when it came out:
1) new class. Never performs at its best like ones people have been doing forever.
2) many darks were x dps. Never have tanked before. Leads into #1 but eh
3) It's not a simple class to play.