Left Shift = Mount key (I use Skyscale here)
F1 = Griffon
F2 = Raptor
F3 = Springer
F4 = Jackal
F5 = Skimmer
F6 = Beetle
Sidenote: 1,2,3,4,Q,E,R,C,X,Z + alt combos of these keys I use for combat skills cause I want them to be close to the movement keys (AWSD).