Ashe Build

Ever since Ashe's reworks and updates I've been confused on what to build her now. For season 6 I've encountered many builds. Firstly is Infinity Edge still good on Ashe? Would Essence Reaver be better subtitute for Infinity Edge because of how much we can abuse ashe's w? I would like some pros and cons of building them or if its viable to build both if the case arises. Secondly I've seen people try to build Black Cleaver on Ashe saying that her q is such a good armor shred and it senergizes well. I fail to see the logic in this since I feel that instant armor shred from the last whisper items look better. Another weird item that people say is good on Ashe is the boots of swiftness because of how immobile Ashe is so building that and having the AA slow should make a good combination. Thirdly is Death's Dance any good on Ashe, I was curious on much I can abuse the W with 40% cdr with both Death's Dance and Essese Reaver . So in respect to this discussion I was thinking of a build somewhere around like this ( Some Kind of Armor Shred ) if i don't need any defensive item.