I didn't have any of these pets so I used Core hound pup (1,1,2), Amethyst Shale Hatchling (1,2,2) and Pandaren Air Spirit (2,2,2) I think you could have any Pandaren Spirit here it wouldn't matter. Howl > Bite > Bite (Timbo dies) > Burrow > Bite (Core hound pup dies) > Stoneskin > Poison Spirit > Burn > Burn > Burn > Burn (Burly Jr Dies) > Burn > Finish Timbo with Arcane Storm/Wild Winds. You can really have any elemental pet in slot 3.
Worked fine for me. I did have to adapt and overcome a few things... Don't be a robot. If your pet in slot 1 dies early bring in the 2nd and see what you can do, you'd be surprised. This website is amazing and this person obviously puts a lot of time into it. Lets try not to bash it the second you hit a lil road block.