Originally Posted by
Torrian
Valkyr Twins is not a great fight to use to compare your dps with someone else's - because of the mechanics of the fight, the following can have a large impact: 1) which twin youre on, how many times you have to switch essences and targets, and how quickly you do it becomes a factor - 2) how aggressive you are in grabbing orbs to stack to 100 to get the buff - and how many times you get it throughout the encounter.
Some fight's gimmicks are more advantageous to fury warriors than arms (any fight that has a multiple targets will benefit fury more since they have imp. cleaves and less cooldown on their WW ability). Patchwerk used to be a great litmus test, but no one runs naxx anymore. I'd suggest you run some meters while attacking one of the raid dummies in town, even grab your fury guildie to do dps comparisons with if you can.