Nathsar and the post-nerf Anaphylaxis with the WIS line are both disappointing.
Depending on what other 4.0 dual wield you can get your hands on, I would stick with the Carotidcutter and another weapon. The 5% doubleattack will do you more good with two weapons, even if one of them is the gdoh, then it will do you with the WIS spec.
At the end of the day, just be glad your lucky enough to get a Carotidcutter

That piece of shit never drops when I do crypt lol