11/41/9 is the standard hunter 2v2 and 3v3 spec, what you posted used to be close to the standard pvp build.
The reason for going 11 points in BM is because you get both imp. revive, making reviving a pet midgame possible and the runspeed bonus for pets so they can keep up with a ghostwolf or travel form druid to keep them in combat and prevent them drinking.
For playing wth another dps, especially an enh. shaman I would go with something like
0/27/34 to maximize the CC you have so you can (more or less) completely lock 1 opponent out of the game while you both burst down the other.
Playing with a scorpid is madatory ofcourse, you need the scorpid sting to cover up Viper stings when you are draining someone.