I run 3 beast master specced hunters and I use a click macro, but my hunters arent more than lvl 38 as we speak

Macro 1

/castsequence reset=target Hunter's Mark,null

Macro 2

/cast Blood Fury
/castsequence reset=combat Serpent Sting, Arcane Shot, Steady Shot, Steady Shot, Arcane Shot, Steady Shot, Steady Shot, Focus Fire
/cast Kill Command
/petattack
/Kill Shot