How do I complete the Destroyer of Destiny achievement?

The Destroyer of Destiny requires that you destroy all 4 Activated Pillars in the Royal Crypt at once. This can obviously only be done when going to face the Skeleton King.

The pillars are placed a fairly good distance apart and all of the AOE or AOE-like attacks that I have tried with either the Monk or Demon Hunter have failed to destroy all 4 pillars. Replaying the section from when the Templar joins up to the pillars is getting tedious and I'm really at a loss.

What character/attack/strategy should I use? Is this something where you need a 4-player co-op to achieve it or something (exact timing on this would be bananas)?

Monk's Seven-Sided Strike right in the middle:

I did it as a Wizard using Disintegrate with the Chaos Nexus rune. Just stood in the middle and fired the beam in a random direction, Chaos Nexus did the rest. I was lvl 37 at the time, with about 660 dps.

Use Rain of Vengeance as a Demon Hunter

Spike trap with bandolier worked. Place before any of them "come alive".