BM requires Crit to function, as you will never be able to maintain 3 stacks of Barbed Shot at 4X without
One with the Pack or a build that sacrifices wearing
Green Dragon Mail for the required extra Crit/Haste.
PvP talent wise I personally think
Roar of Sacrifice is lacklustre compared to others, especially
Spider Sting, as crits are already suppressed in PvP.
Hi-Explosive Trap can provide similar peel alongside 1HitK0 potential on maps with fall hazards. Speed is life, so
Hunting Pack I think can also be really good depending on how you like to play.
Pet Wise you are going to be using either a Raptor or a Wasp in almost all conditions pre-65, as MS+Leech/MvmtSpd are without a doubt the only options.
At 4X you are missing some pretty important aspects of the spec, being your
Exotic Beast and Rank 3
Cobra Shot, so a lot of your success will come in pumping out
Incendiary Ammo procs.
Happy Hunting!