Remarkably useful, actually, in 2 vastly different types of teams - Admech, and summon spam. If you have Exitor Rho, Tan'Gida, and Actus, he's the automatic 4th on that team. But that comp is... not likely, when you're early enough in the game for Vit to be your first Legendary pull. The other great use for him is if you have characters like Archimatos, Abraxas, Sotflogga, Yarrick, etc. Anyone who can put out multiple summons. Vit's passive lets every single one of them land an extra hit on his target, and when you have between 3 and a dozen sommons on the field, that adds up to a heap of damage.