How does DRK stack up with other tanks at level 80? I mean like self-healing; damage output; mitigation; self-sufficiency; is there anything the DRK excels at compared to other tanks, or is DRK just a more viable version of last place at 80?

I mean, I like the DRK aesthetic and I think Living Shadow looks like a lot of fun, but I'm not sure if that's worth committing to the worst tank class in the game; if that's the case.