Best augmentation for bow?

[Testercules]

I'm guessing barbed razormaw spine? But not sure. Also can't find a BiS list online that mentions augments to use.

[Scarchasm]

not sure how it works on the bow slot.. but if it's like armor, razormaw spine will end up giving you 1-2 total crit more than the purple thiefstone, but will be split like 5-6dex, 7-8 pcrit instead of 10-12 dex - so you'll be giving up AP for it

it'll be 1-2 pcrit points either way.. i'd go with the cheap one!

[Repster]

Valor. Otherwise, whatever gets you the most crit.