Good afternoon OC!
I recently discoveret some changes they've made to Tuft of Yak Fur: Tuft of Yak Fur - Item - World of Warcraft
They just forgot to nerf this method in situations such as Challenge Modes. This is gamebreaking if you are seeking the best timers!
You can use this in outdoor places such as Scarlet Monastery, as you can see on this pic:
https://i.imgur.com/3hQBZxB.jpg
All of the CM's got outside areas which makes this usually for all of the dungeons!
This instant cast Yak goes with a speed above 400%
Bonus info: The speed increase is so massive, that you barely take any dmg during this 'buff', which also makes it great for kiting!
EDIT! You can get 2 similar items, called Oddly-Shaped Horn & Bag of Kafa Beans, both both 3 charges each. That means you can use this 400% speed bonus up to 9 times before restarting the easy farm for the item!
- Bluetears