During the air phase we noticed that if you used Feign death, he immediately started casting the tracking ability on another raid member, so this might not be the best way to use it.
Definitely not, you run the risk of putting the tracking on another raid member (and without warning), and Hunters are more than capable of kiting it for a substantial amount of time.
When the air phase starts I usually turn on Cheetah and begin moving in preparation for the tracking. If it's on me, I've already got a head start without having to disengage and can jump-disengage later to get a bit of extra distance.
Cheetah is pretty good in this situation but you have to be careful with it and keep moving. If you stay still for a few seconds you could get hit by the fire and be dazed.
Worgens have their Darkflight too, which is best used here.