The easiest way to do it is to have either an entire melee group or an entire ranged group. You need to make sure you start at the corner between the 1rst and 2nd drake so that melee can sit on the edge where you will tank her to escape firewalls. If using ranged they just sit in the middle area while you tank her in the corner.
Every dps should be doing 4500+ and you tank should be pretty geared as she will begin to hit pretty hard. If you wish you can use a hunter to pull the first drake away from the group towards the entrance to the instance but this is not completely necessary.
I use 2 healers and I choose them depending on my construction. If it is all melee I use a resto shaman and some sort of tank healer (paladin usually). This way you have a shaman for bloodlust and he can easily heal all of your melee since they will all be right next to each other.
Experiment with it, look up some videos, it is not such a hard task anymore just make sure people use their cooldowns and watch what they are doing, you cannot afford to have any mistakes.