In Dragonflight there is a potion called Potion of Gusts (use the highest quality) that can propel you forward a significant distance. So if you did vengeful retreat first and let it go the farthest possible after that you can use the potion and actually go a little higher up and have a 3-sec slowfall. It's essentially a Fel Rush that doesn't need a 1 sec cooldown if you used Vengeful retreat before. That's one of the potions I used to help me break out of the Ruins of AQ. Hope that helps with future OOBs!