With recent mutilate changes, it means we'll need to look for alternatives in PvP.
Mutilate will possibly still be viable, but will probably be dependant on gear more than usual. (In theory I might be okay with what I have, but people with blue daggers are probably about to feel pain)
Some people have been suggesting alternative builds already
One that I've found interesting is a hemo variant.
http://www.wow-tools.org/talent-calcula ... 0133000000
Relies quite heavily on stealth to provide the burst, but typically in 2v2 fights rarely last more than 45 seconds. By that stage double DPS are either about to win, or about to lose!
It exploits Overkill (-10 energy for abilities for 6 seconds after breaking stealth) and Master of Subt (+10% for 6 seconds after breaking stealth.) This takes hemo down to 25 energy.
With typical energy of 130 to start with, hemo hitting for 1.1k non-crit (possibly more depending on how much the +dmg buff works), you can get 5 hemos in 5 GCDs without any energy regen
with an opener into 5 GCDs, then eventually kidney shotting, might give us "stuff". Problem is, the stunlock we're used to can no longer be maintained in order to exploit the 6 second buff
Theoretically it might work, but needs testing.
Other people are talking Adrenaline Rush / Prep (with maces) but this is probably going to have to wait until 3.1 when(if?) Adr cooldown is reduced.
Difficult times!