been there, done it... wasnt me leading tho :/ but tbh visionofsages gives good back ground info rly, i recall the need of pbae-fair number of tanks and healers
so kinda need a semi_decent balanced fg there to do it properly
You can do them with 1FG, but I found the most solid way to make sure they get done is to bring 2FGs and do each step twice. Obviously it takes a bit longer, but you won't get hung up on aggro between steps, and the steps themselves go much more quickly. Respawn is quick enough that you won't be stuck waiting around. It also requires some co-ordination in that when you're doing things the second time, the group that already has credit needs to make sure not to land the killing blow, but I've run raids both ways and find it much easier with 2FGs.