As Fire, pet will just eat all the disarm effects and debuffs for breakfast. Instant Ress, Bullheaded or Last Stand you choose, not counting a higher HP/Armor and less Magical Damage taken, GL trying to kill the pet xD. If you go for the hunt, pet will simple eat your ***..., even a with tenacity one (Tanky ones). They will "eat yo azz alive bEEtch" -like Mike Tyson- because you can't Parry>Block>Dodge from Behind EXCEPT!!!! Hunters :D with deterrence -patch 3.2.0, btw not working-.
As Arcane you are more about burst than debuffs or control AND no other spec brings more burst in this game and in this patch than BM (Full spected), not even warriors with BS. Lets call it it the Dragster spec if you want :D. 10sec of TOTAL UNCONTROLABLE AND PURE ANGER TO THE BONE, and you better step away on that moment. In this patch, as far as I know is the only completely unCCable effect, aside Bosses's Berzerk, and not because they are on Berzerk but rather that because you can't cc bosses types npc because "Like a Boss" -thelonelyisland-.
Tip:
DON'T Try to LoS a BM hunter, pet have movement speed increase AND the ****ING ABUSE OVER TEXTURES aka "I'm just LoSing your pet" is over finally.
Just grab your balls (snow ones) and Focus pet and Poly, Force Bestial Wrath, Inmunities (Ice Block) > Bestial Wrath. After Bestial Wrath is wasted, keep Focus-Pet-Poly and kill the hunter while you eat your mana strudels "mounted /cough" and play with your snowman's "carrot".
Didn't happened "exactly" like that? just basicaly Ice Block the Bestial Wrath and Invi after, Focus-Pet-Poly and GG.
Ofc this is just the "theory"... but like I said before, I'm talking more from the experience.
NOW...... Hybrids BM are another story >:D, lets call it the "Drifter" Spec haha...