I like DW, one of my fav. class but he's weak. Weak in attack, weak in tanking.
Boss will stun Your DW when Your taunt start to end and You will lose agro. SK got also agro from attack (DW atk. suck) and Dragons Will.
In my opion DW is only best for farming. CD gear + energy siege and at the end, before mobs die, You use Punishment to heal yourself and end of battle with full LP. Very cool for farming. Don't try to make him tank, SK is better.
For PvP MAYBE with Mystic Attack (pull arm) and Confusion You could do something I believe.
DW need 2-3x longer "Powerfull Roar" taunt that also generate high amount of agro and he will be better tank.