You may not think of her that way, but we may have a player already signed up that could guard the perimeter despite her 6-3 height in Ayanna Patterson. I have not seen a ton of video on her, but there was some where she was guarding way out away from the basket and I was hugely impressed. In fact I remember her quickness and length there reminded me quite a bit of Scottie Pippin in terms of style of defender.
I went from wondering if she was mobile enough to play the 3 defensively, to being sure of it, and thinking she might be a stopper you could use against guards. As quick and mobile as many, and much bigger and longer.