If you don't have a pet with % damage passive then don't worry, sts has you covered.
Here is valkin in town:
http://img.tapatalk.com/d/14/06/04/hynavame.jpg
And here he is in pvp:
http://img.tapatalk.com/d/14/06/04/9y7uqu3a.jpg
This buff applyes on all pets who don't have damage passive. Pretty neat if you ask me just another proof that stats are a lie