Adaptive Damage Broken On Corki

I build AD so it does physical damage. Corki deals 90% magic damage. Adaptive damage runes should match that. EDIT: I'm not talking about Corki's concept. I love that he's a magic damage ADC and it makes room for stuff like Talon/Zed mid if Corki goes bot. It's fantastic. My problem is that all the adaptive damage runes STILL do physical damage on Corki.
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