Nothing is wrong with Dark Dance. Parry however right now is just complete ass. Plus Dark Arts is really DRK's main gimmick. However even that's a ripoff of Warrior's Infuriate. A MP costing 5 second recast Infuriate at that. Gives no buffs like WAR outside of the action and just enhances existing actions much like getting access to IB or FC as a WAR.

Not to mention all the carbon copy slightly altered PLD skills.

In retrospect a mish mash of ideas.