First think is free pet sacrifice, I found this one after they nerfed the casting itervien spell the sacrificing. You have to have a second pet like the shroom guy from Splitpaw. Call up the Sporling shroom guy after you have a pet up and buffed then zone somewhere. once you zone you can sacrifice pet and the fun pet dies and you still get your heal and power boost and keep fighting pet.
second thing is a way to use control pet spell to get through forcefield or walls or place u can see but cant get too. with pet up and on follow walk into the wall or forcefield you want to get through even though you are not moving your pet will eventually take off running through the wall, when pet runs through wall click the stay button on pet commands window. keep walkin g into the wall while casting take over pet it will eventually cast and you can run around with pet and pull mobs or open those doors that say door can not be opend from this side.