Depends what your useing it for Terra's and griffins speed argys for weight and carrying small too mid size Dino's tappejarra or griffin for solo tameing quetz and wyvern for farming mats and carrying large Dino's
Depends what your needing to use a flyer for i think all around Griffins they are fast and can move side I like using pteras for PvP cause we have so many and are the easiest to breed