Delete your Tauren, and make either a Troll (berserk pwns) or an Orc (+5% pet damage ftw), altough War Stomp and 5% Stamina is also great.
But if you want to be PvE, I suggest you go trough the beast mastery tree, with a bit of Marksmanship.
I only have an hunter up to 26, but a good tree for lvl 60 could be
this one, simply considering that it is fundamental in PvE that your pet survives and can get aggro out of you, as long as you try to make as much damage as possible with your weapon.