The Dark Knight Ding Thread is dead. So are most of the other threads. Other sites and everyone pretty much having iLevel 119 gear is making DRK discussions a thing of the past. But I think there's still plenty to talk about with specific jobs; and specifically, my favorite job.
Many of us have run with DRK/NIN at one point or another. Long ago it was for survivability if we wanted to use DRK but didn't have a party or a healer...or if we needed to do some heavy traveling through areas that required Sneak and Invis. These days, everyone typically uses either /SAM or /WAR. However, I've discovered that DRK/NIN can still be quite useful, and very fun. There's a new Unity sword that has a HP drain attribute, and a slightly older sword that has a TP drain attribute. I never gave much thought to a sword-wielding DRK until I got the Unity sword and saw that only WAR and DRK can use it. Say what you will about SE's motivations, but they make things like that for a reason. So, I decided to test it out. While a DRK's sword skill (even with merits) lacks the rank and accuracy to be useful in the deep, locked recesses of Sih, Woh, and Dho Gates, it is more than enough in most other places...as high as Marjami...even Delve. And here's the best part: DRK using Savage Blade and wearing augmented Alluvion Skirmish armor does on par with or more damage than a GS dropping Torcleaver. And it does more damage than Apoc doing ANY WS with the double damage proc. In some places, you can kill faster with DRK/NIN than with DRK/SAM or DRK/WAR.
Try it out.