I'm having a lot of success with this build:
MH Dagger / Focus
OF Staff
I sometimes mix out the elites (especially in dungeons when Fleshy wants to say hi to everyone), but I find his interrupt and damage very reliable in most PVE situations. Best part is you're not locked out of your heals and other utilities that Power melee's rely on to survive.
The build primarily centers around staff for control and dagger for most of the upfront damage. I start in staff usually and switch to dagger after the enemy has 10+stacks of vulnerability on them. Laying down the well and wall will grant you Chaos armour and area blindness when you combo it with exploding minions. This combo is devastating for big mob pulls, because after you take all the aggro, switch to Deathshroud and Life-Tranfer while kiting. Massive AoE P:
Your auto attack in Deathshroud will grant you might (and apply vul to them) so I often switch to deathshroud before committing to Dagger/Focus to get that buff in. Your dagger's 1 will be where most of your damage comes in at this state, but with high stacks of vul Life Siphon is pretty awesome too.
It's a very active build that has a lot of range and melee capabilities. Very durable too, with the protection and best heal in the game, Consume Conditions. Try it out (:!
As for gear I'd go Power Precision and Toughness (in deathshroud form vitality doesn't matter).