Ah, the lock/boomkin ideas are good, except that our Lock is one of the players who went on hiatus for awhile for family reasons. As of last night people had decided to just send the boomkin up solo and that seemed to be working okay. We were getting a 4th siege and it seemed somewhat unreliable that the boomkin could stay alive through smash and the balcony DoT. Then again, he's not been going up much until this week so its relatively new to him. Trying to get shields out on him before smash so that he has more health up top as far as I know.
Anyway, we adopted some of the stuff mentioned and i'm fairly certain that if we can round up a full raid this weekend we can probably kill it in the two nights we raid. It will be interesting though having only 10-11 people, missing the Warrior tank and 1 hunter. At which point our pally can tank, but that loses us pally healer. SPriest will likely go healer and I think that would fill in. Not sure how good the pallies OS gear is but my BrM spec is 100% WW gear. I think pally is the better option.