I have not played a Demon spec
Currently I am full affliction spec
I always send my demon after the hunter himself to start.
If you are affliction specced, it's not so easy but the same applies...you have to fear his pet away from you. If you specced instant howl (if you didn't...your crazy

) that will work so you wont lose half your health before getting a "fear" off on the pet...unless you see the pet coming from so far away you don't need to do this. Usually in PvP, the pet is on you and you go "Oh, @#$!"
So I would Instant Howl when the pet is on you, then Fear Pet, then DoT it quickly with Curse of Agony and Corr. Turn your focus to the Hunter and (send your demon if you haven't had the chance yet ) UA, Curse of Agony, Corr, SL...then Immo and SB. Don't forget to keep fear up on the pet in between...I have not needed more than 2 fears before one of us is dead
If you are Destr Spec, (which I played forever b4 the patch) you have no choice but to try to get a Fear off immediately on the pet...as the creature keeps hitting you and your health is going down and your going "cummon, cummon..." But when you turn to the hunter you want to Immolate first, then Confl, then Immolate and then throw up your Curse of Agony and Corr...SB or by that time you can just finish him with SBurn
One thing I did not consider is Shadow Fury to stun the pet intially which is only a 1.5 sec cast and then fearing Pet....you may play with that one and poss let us know.
Despite this, I have had a HUGE problem with hunters since the patch...with silencing shot, the ability to set traps in combat and a whole host of other things I would have to say they are the New "Overpowered" class on WOW.
My son is a 60 hunter and the laughter coming from his computer room is non-stop
