Do NOT make the same mistake as FFXI.

[Powercow]

Honestly, the only skills I know of that that can interrupt enemy skills are Barbaric Yawp and Shield Bash. Barbaric Yawp is absolutely worthless, an interruption skill on a 2 minute cool down, and Shield Bash is on Gladiator. Besides, the last time I fought that Ogre I could have sworn he had 3+ AoE's, each with a 10 second cooldown or less.

Well the Ogre only has a couple attacks:
A single-target punch and knockback (Bone Breaker).
A 180 degree frontal Double Slam.
A 180 degree backwards Elbow Drop.
A 360 degree fire elemental Inferno Drop.
A very large AOE stun.
His normal autoattack, which is single-target physical damage.
His normal ranged attack, which is AOE fire damage.

All of these can be used generally within a couple seconds of the last one.

So I doubt the 2-minute cooldown ability would help, even with perfect coordination from all 8 people to use it.