Keybind the Mount Ability 1 (not the attack) to the number 2 key and the Mount Ability 2 to the number 3 key. Now, when you dive off high areas, you press the 2 key to dive, the space bar to flap and the 3 key to pull back up...this way all of your binds are easy to reach. You can also bind them to your normal 2 and 3 keys you'd use for your skills if you don't use 2 and 3 (meaning if you use other keys, use those for the binds)