19/11 or 21/0/9. Flat AD marks quints, armor seals, MR glyphs. (armor pen marks and life steal quints are other options).
Ezreal players didn't really max W for "cheap and easy harass" in lane, W was an auto win trade in lane, as well as being easy harass and damage (its not even as "easy" since the width was nerfed lower than it's ever been). So basically, Q>E>W.
As for builds... TF first if ahead and standard AD carry