I think so
60% displacement
100% fort
300% movement speed from things like expeditious retreat and shadow walk
aoe instakill (shock ball with metamagic feats on) on less than 2 second cooldown
the blink air savants get at third prestige
around 500 base hp
can heal self at the pace a pally can lay on hands
he could win without having to heal himself once, and maybe without getting hit once. He could probably win without even moving from his spawn and inch
i guess its realistic but you could also do something were the twelve disables some uses of magic in arena or something if you wanted the lore to be correct and pvp balanced