I agree with Fedifensor. A seven shift evocation is pretty much an instant win in the absence of toughness powers/extremely high defences. And there are no social toughness powers, which makes wizards the best social tanks around.
If you still support the idea of magical social attacks, remember that social combat attacks lack weapon ratings. Weapon 5+ attacks aren't exactly fair when everything else is weapon 0.
Maneuvers are probably fine, though. Sinker's example sounds like a combination of a spellcasting maneuver and Great Intimidation to me.