Offhand comparasonFollow

First off, here's my armoury.

http://www.wowarmory.com/character-sheet.xml?r=Agamaggan&n=Milkros

Anyway, to the point. I snagged Talisman of Nightbane in a Kara run today, though already have Fetish of the Primal Gods. Just wondering what people think is better. A little less dam and haste for some spell crit?