The best DRKs were used as tanks in FFXI. They held hate better then any job up until the magic emnity buff. They also where the only job that could cap haste for years. 93.3% weapon delay and capped recast for shadows made them extremely potent for tanking HNMs. Even after delay nerfs and hate nerfs people still used DRK to tank because it could access the best -PDT gear and still maintain DPS for hate. Apoc tanks were particularly effective.