The only dragon rider everyone uses these days is Nadia and she breaks the "dragon riders have magic skill rule". Her skill allows her to attack all enemies in her surroundings and increase her DEF. Her S.AW is pretty much an infinite duration of her normal skill. And thanks to her passive, her HP goes up to 3685, ATK to 1031, and DEF to 614. With those stats, she'd wipe out any mobs before they reach home base.
Oh, you meant Ester (lol, the devs ran out of ideas for names hence why it's confusing sometimes). Her UP is around the mid 30s, but still high I guess.