You really want to be close to the light well for this. Perhaps totem drop close. Definitely don't want to lolziwtspam the light well, just a single tap ... as when that thing disappears off your guys go likely straight for the boss for /hugs.

At times I have been able to iwt with my hunter pet, but not any of the warlock pets. My hope was to figure out such a thing for a 'all non tanks run to the safe spot' that the hunter pet would be setup to go to during an encounter (like the warlock teleport trick). But its just not reliable.