This was taken from some dude on the thottbot comments, but screw him.
Basically fly to an island in dalaran that is still PART of Dalaran.
Get on flying mount but stay on ground.
Click torch so green AoE circle pops up.
While AoE circle is up fly up in the air to max distance with AoE circle still showing.
Demount, spam torches all the way down.
Continue to spam upon landing.
The way this works is by the time you land, there will be an extra 7-8 torches in the air on the way down, so when you start throwing in the air, thats already 7-8 or so in a second. Enjoy your fail blizz achievement in a laggy epicenter of failure.