Return of Reckoning

I thought the DoK had a heal debuff in the form of tactic "Curse of Khaine". This would make the DoK a more viable DPS class over the WP. Also, cant the DoK generate AP faster than a WP because of dual wield?
This is a legit question as i'm no where near being an expert on the game.

Just wondering which classes you see as being the most played, and least played for each faction.
Also your perspective as to why.

In "Live" i played a DPS Warrior Priest...got a lot of grief for thats ok. I would like to play a pure DPS class but torn between the Witch Hunter, White Lion and Slayer. If possible, would like to see your perspective about... How played in RvR and enjoyment factor of the class(s). also, ...