What's always really bugged me about drk is how shielding nullifies blood price. I pretty much stopped queuing dungeon roulette on drk because the average duty finder sch or noct ast isnt going to bother playing around it. It seems like really weird design and is inconsistent with the overall balancing of party comps (that is, maybe some jobs synergize a little better than others, but there's nothing else like how bad combining a scholar and dark knight is)