I don't disagree he'll have a good career. But he will be best on a non-possession team. Which is not what we are. Could he be a backup here? Sure. But he'll be half the player he was meant to be, trying to play out of the back and lead attacks trying to breakdown tight defenses. If we buy a CB it will be because we are trying to upgrade our starters. We don't need a backup. We have 4 capable CBS. All superior possession based CBs. So Mangala is surplus to requirement.