However, I did learn a bit just from practice before the fight. One of Archie's abilities is "Air Burst," something that tosses you into the air high enough to kill you if you don't break your fall somehow. Some classes can naturally counter it, like mages' Slow Fall. For the rest of us, Tyrande Whisperwind gives you an item, Tears of the Goddess, that works in the same way, slowing your fall for two seconds. Because of the very short duration on the Tears's slowfall effect, you've got to be pretty dead-on, using the item just before you hit the ground.
So, we all spent a while before the raid started, practicing with the Tears by jumping off a cliff inside the instance. I was really good with mine, but I did die once when a hill stuck out farther than I expected. That's when I realized I could be doing something a lot smarter.
/use Tears of the GoddessMy lovely Parachute Cloak, on a fairly short thirty second cooldown, gives me ten seconds of slowfall, versus the two seconds from the Tears. The Tears are on a shorter, 10 second cooldown, so they go first in the macro. But generally speaking, it's the Parachute Cloak that's going to save my butt, as it gives me much more lead time to break my fall. And since Archimonde is a survival fight, not a dps race, I don't miss the dps from swapping my cloak at all.
/use Parachute Cloak