I was kicking around in the tankspot forums this morning reading strategies on Yogg and I found this:

"In 10 man, it's possible to concentrate the whole raid on top of Sara. This means that everybody takes the damage when Guardians die, but if the healers together are able to sustain about 6000 HPS, it can be healed through. All other aspects of the fight are trivialized (no clouds ever reach the exact center of the room, DPS is maximized). It's not clear whether this tactic might work in 25 man too. "

Depending on how ambitious the healers are, and if we have a certain shaman willing to spam the crap out of chain heal *cough* Tin *cough* I think this might be the way to go.