Our pet-specific buffs may not affect mage pets, but our regular line of buffs do. Pets have notoriously low agility and dex, simply casting IoS (if there isn't a sahmmy around) on a pet will boost it's dps. The agility really helps a mage pet's avoidance and for it to fire Burnign Aura procs.
Yes, the armor, weapons, belt and muzzle plus aura bonus that a mage can give to our pets boost us more than the stat and hp buffs can boost theirs. Big deal. As I said in their thread, I saw a mage pet tanking in Valdeholm spider pit. The day I see a beast warder doing that same, I'll start trying to sell showshoes in hell.