I've been working on my PLD nexus lately, so I don't think tanking in DRK would be harder than old tank jobs.

But I will do DRK the very last, since I don't really like the job name itself. Just as I unlocked that job as the very last in XI (yes, I even unlocked Adoulin's RUN/Rune Fencer & GEO/Geomancer before it), so will be DRK in XIV. lol

However, I've been playing with RUN in XI and I do like the job so much, I've been maining it for last few months before I stopped subbing. As I see how DRK in XIV plays quite similarly with XI's RUN, I might give this a go.