Can't Touch This

Vision is one of the best tanks in the game, thanks to his Intangible ability. This gives him a natural 2 points of damage reduction. This, alone, reduces many attacks, especially from minions, to negligible levels. But not always. He can supplement that reduction further with Energy Barrier and Subdue, or become immune through Perseverance. When he is Tough from Perseverance, or just doesn't mind taking a hit, he can dish back respectable damage while in Dense form. With his cape, he gets retaliate one. With Dauntless and healthy, he bumps that up to two. With Energy Barrier he can increase that by another 1-3 (depending on how many are in play).

Bait and Switch gives him some extra thwart potential while intangible. He can just eat an attack in exchange for four threat removal. Ever Vigilant, Reboot, and Ready Rumble help ensure he's always ready, potentially multiple times per round.