I'd be tempted to run it straight up as a Veil, with limited control by the caster. That would make it an Evocation block versus their Perception and should draw off attacks.
That's an interesting idea. How would you actually run that? A block limits someone
else's actions, so I'm not sure how you can link it to Perception.
Round 1: Wizard casts "Duplicates", with a Block strength of Superb
Round 2: Ogre uses Fists to attack
In theory, the Block would be against Fists, not Perception, right? I guess I'm not clear on how veils (and Stealth in general) would work in Combat.