this works great in RA/TA/AB/PvE... maybe you should try and see..
call of haste
predatory bond
predators pounce
feral lunge/or rez at the end
melandru's assault
brutal strike
heal as one
charm animal
Beast 15
Exper 13
its basically kite and shoot random arrows to make the pet attack.. follow the skill bar list and 60al targets are gone in seconds.. also.. spirits almost never attack pets it seems.. idk, i've in fact NEVER seen shadowsong hit my dog.. try it out for fun, or to do some new style killing. you'll get blinded/weakend a lot.. dont worry, just heal the pet lol.
I think I found a Beastmaster Build...
Mekkakat