I like the idea of no damage. What about stackable, say two or max three clones? Itd be a good defensive spell trying to find the Mage from the clones to damage him. I could imagine this turning into a great little gambling game in town too! One chance to pick the real me! Watch the Mage, watch the Mage, always keep your eye on the Mage :p
http://www.wowhead.com/spell=55342 like this and tailors to which trait path you go to. Ice casts primary Ice spell, Fire with main fire spell, Spirit with main spirit spell.