as of 4.1 DRK is worse in almost every category than the other 2 tanks.
As long as tank busters remain magical drk will at least take those hits better than a pld since TBN+DM is always better than sheltron. pld would only be better here when tank busters happen more often than once a min and always exceed the drk's hp.
Also sheltron isn't made for multi-hits.

But I still don't see the point in:

- LD having such a long CD when it needs so much more attention than HG or Holmgang. either shorten the cd, make it easier to handle, or change the penalty

- TBN being meant for frequent use yet is unreliable for auto-attacks. Also unless you factor in the possible gain in healer damage it's a lose outside grit. As a party support tool it's also useless. Only good use is if put on the MT. but why would you let a drk OT in the first place? Either make it more reliable for autos e.g. by giving it a longer duration or by returning a lower amount of blood so it's not a total lose

- DM's DA effect. There is only a very small window where DADM is better than DM+TBN. As I already suggested last month DA should give the party a 10% magic damage reduction

- SW's long cd, low effect or lack of additional effect. My suggesion for DM could also work for SW. Otherwise just lower the cd already or bring it on par with sentinel.

- DP's high mp cost. I just don't know anymore what SE with thinking here. Especially that evading still doesn't work too well with BP. IMO the base damage should be much higher and the DA effect should be similar to a reprisal effect. That might even make it raid relevant even with the high mp cost.

- Sole Survivor. too much trouble for bad returns. I'd still like to see it as a self buff that doubles all absorbing effects for a few moments

- Bloodspiller's lack of impact. imo it just doesn't feel rewarding enough. Either have it return mp similar to quietus and rise the drk's overall damage this way or have it return hp to further give the feeling of being a counter attack.

I think there are so many ways to buff drk without overpowering it or making it feel homogenized. But atm SE doesn't even seem to try.