Well since we cant nooboot you here..
Dragon strat explanation:
Dragon spawns 3 sets of 2 skeletons at a time,
they must be dragged away from the dragon and spread out from each other, convention is that if dragon is in the center, you pull each skeleton to an outer platform, and no 2 skeletons per platform.
There is also a slightly less popular 'pull the dragon to the north' and kill the skeletons on the far south... i think this is dumb personally because you dont need more time than the center kill strategy, and tanking on the north means lots (more) dead melee who dont realize purple = poison!
THE REASON
When dragon dies, the skeletons are raised and run back to the dragon
If they are alone on a far platform, they will walk to him, giving you time to kill them all
If they are gathered, on the same platform, they will run
If they are close to the dragon, they have a small distance to travel
If they reach the dragon, its big ae dmg. Pretty much 2+ skeletons reaching boss = 90% of the raid is dead.