Originally Posted by Aldriana

Well, about half the benefit of Dark Matter is the proc - the rest is the passive AP. And since Jouster's Fury has only roughly half the proc strength, and no nonproc benefit (for PvE), it's PvE benefit is going to be 1/3 to 1/4th as good as Dark Matter - meaning, from a PvE perspective, it's absolutely horrendously bad and should be avoided if you have any sort of viable alternative.

In terms of actual numbers - 328 crit rating with 20% uptime is roughly equivalent to 66 AP, or about 110 EP for both Combat and Mutilate.

Compare this to, say, Mirror of Truth (~310), Fury of the Five Flights (320), and Darkmoon Card (380) - it's clearly not as good. Basically, any remotely reasonable PvE trinket from WotLK will be much better. Heck, most PvE trinkets from TBC will be better - DST, Ashtongue Talisman, and the like certainly are. And even Drake Fang Talisman (from BWL) doesn't come off that badly in comparison if you need the hit.

So, in short: thumbs down on Jouster's Fury.