An alternate method would be to stop both toons in your hunters ideal distance and let him initiate the attack, bringing the mob to your toons. I ran a Pally/Preist/Hunter trio with the Pally leading the alts and used this method pretty successfully. I had the toolbars set up so that the same keypress would set the pally into Attack, the priest would Smite, and hunter would Auto-shoot. The pet will be the first to tank, but agro will bring the mob as far as your Pally who can take over agro.