Spec used: BM. Gear: half epic and half rare PVP gear. A few pieces of LFR armor. Pet used: Spirit beast.
The main idea of the fight is to stay very close to the gnome so the rockets that are being throwed by the goblin will hit the gnome too. The gnome will take a lot of damage from rockets. You should avoid getting hit by them as they usually one-shot.
Start the fight by blowing every cool down. Bestial Wrath, trinkets. Don’t use Stampede, you will see why.
Nuke the gnome.
When he goes in the shield, go there and stand near him, waiting for the rockets to destroy the totem. Do the same for the other shields.
To avoid the rockets, strafe slowly around the gnome. Avoid moving your pet too much, keep it all the time on the gnome.
Very important
The fight is bugged for hunters. When you use Stampede or if any pets will be summoned by trinkets (there is the engineering one), the rockets will not follow you and they will land in random places.
Use Stampede when the gnome has very low health and the rockets won’t matter that much. Do it near enrage, when you feel that you need all your damage.