Rogue feint, Mage greater invis (I think), Hunter Deterrance, and if needed, tank will cooldown the last one before a push.
We used rogue feint, hunter deterrence and feral druid barkskin + survival instinct.
We used a shadow priest with dispersion, an elemental shaman with shield wall, and a warlock with bubble.
Voltage, Delver of the Vaults.
We use a mage with invis, and a DK with AMZ AMS and IBF. No stuns. Ever. We never get a 4th add.
Boomkin can do this easily, with barksin + might of ursoc, or barkskin + (or alone) unending resolve from a lock