Wanting feedback on build idea.

I was watching a redmercy video when I got the idea for a yasuo top build. Core items Im going to be testing it a bit more to see how it works when your behind. But you would still kick out the damage and your dual potential is ridiculous he stays alive in teamfights and still dishes out enough damage to carry. But if anyone has any ideas or arguments let me know. btw masteries 12/0/18 grasp of undying.