Way, way too cost inefficient, and the passive adds very little damage overall. It's mostly for the slow.
I actually got a chance to try it a couple of games. It didn't seem to hurt or help. So, yah.
His kit scales 4.1 per bonus AD versus a 0.5 per AP passive.
Also 0.5 AP on his heal. Still don't suggest building AP.
The only real ap item I can consider on him is Gunblade, till we get an AD Spellvamp item. And still, just get someone to build a WotA.
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