Rework Ashe for S6

So. with all of the drastic changes to making each of the marksman unique, I purpose a slight re-work to Ashe; specifically her passive. As of now, her secondary stat scales off of Crit. I purpose seeing this being altered. with her Q focused as it is with multiple shots. I propose Armor Shred. Similar stats as the black cleaver, 6 basic attacks would create a 4 second armor shred applied on hit affect. This passive should be able to be stacked with items which have a similar affect. I believe this will create a niche position for her to be a tank killer while having little affect against assassins.

Just a thought.