How do I complete the Takes a Lickin' achievement?

The Takes a Lickin' Act III challenge achievement says to "Get licked by 5 different Soul Rippers, Soul Lashers or Soul Devourers at once."

Trying to both survive kiting what small grouping of 3 of these that I find together is hard enough, especially without killing the little mooks, but even when I do get 5 or 6 of these things together, shortly before the effort kills me or I accidentally their faces, the achievement doesn't pop. What's worse is I have some equips which have damage on hit so they also tend to kill themselves along the way in the rare cases.

What is the strategy or approach necessary to complete this achievement? Is there a particular class/skill that would be helpful? Is there a location that this would be easier to do this in?

After you get high enough in level go back to normal and make sure you dont have any armor one that deals damage when you are hit. You should be able to find enough and not take much damage. Stacking a little bit of armor wouldn't hurt. Also, you may be able to simultaneously drop and regain agro or cause mass stun to cause simultaneous attacks on you via character abilities. If you do not have a class with such abilities you may be able to use the town portal ability to enter the area and gather agro all at once, causing simultaneous attacks.

Try using something that stuns/blinds enemies, or that makes you drop aggro, then be in range for them to turn and attack you once when they get out of stun

For example, a Monk can use Blinding Flash to stun all enemies in the area without damaging them, and then just hope at least 5 decide to do their tongue attack once they've recovered

I'm not as familiar with other classes, however I believe the Barbarian's Ground Stomp will also stun, the Wizard's Teleport will let you teleport into a group so they'll all turn and hit you at once, and the Demon Hunter's Smoke Screen or the Witch Doctor's Spirit Walk will drop aggro, which should make everyone turn and hit you simultaneously once you appear again.

I believe the dungeons below Bastions Keep is the best place for this (can't remember what it's called, but seen at least 2 other people get their achievement there while going through with them)