Is this really optimal? Wouldn't it be better to use rapid fire immediately to start with, waiting until it's duration is up. At this point you should have full stacks of Frenzy and Rabid so your pet during Bestial Wrath would be doing significantly more damage. It also starts your long cooldown going immediately.When the boss is pulled:
Make sure you prepot (use a Potion of Tol'vir just before entering combat)
Hunters Mark
Fervor if low on Focus
Serpent Sting
Use your Bestial Wrath, Synapse Springs, Call of Wild macro with Blood Fury (if Orc) (don't use Rapid Fire, Berserking (if Troll) or Fervor, your shots are reduced by Bestial Wrath, it'd just be a waste)
Kill Command
Arcane Shot (Spam until Kill Command comes off CD)
Kill Command
Arcane Shot 2 or 3 more times since BW should still be up for a few more seconds.