Wait , what ? Are you dumb ?
In pvp sapping a shifted druid , or hunter's pet , or shaman's pet , or the ghoul... Is not more important than 10 energy ? For how long are you playing your rogue ? 1 day ? e-bay much ? scammed account ?
Christ . I'd give sap a 70 energy cost , just to sap ANYTHING . ( And yes , i`m a pvp rogue )