So to explain.
I rolled a 2h and bow nightblade, hoping that class wasn't a factor. It turns out to some extent it does.
So a bow using nightblade for single target can push 250-300 DPS on a single target. This is currently the same as a Templar Tank. A sorc with a destro/resto staff can push 400-450 DPS on single target.
Then on AOE, depending on mob size a nightblade can pull 600-800 and a sorc 1200-1500 per pack.
Its not the nightblade per say that is the problem, its the way classes synergise with the weapon you use. Nightblades are very PvP burst damage focused and outside DW its really noticeable.
So i've rerolled Templar Bow and 2h/destro staff, as i feel based upon a couple of hours of research it will synergise better with the weapons.