I mean I think if you going into a raid with a lot of raid wide damaged (God Kefka) who cares about which tank does more damage. Raid wide mitigation is way more important than a tank's dps. In my opinion they either need to give DRK a raid wide mitigation ability or some other utility to add to its value in raid content. I think giving them an enhanced reprisal that could stack with a normal reprisal but have a longer cool down would be a good way to do it. Or even let them spread the blackest night shield to everyone in the group.