Ana could win. I recall her slagutering Vermin and giving Kaine problems. Miles hasn't fough someone as skilled as her who uses blades that can one-shot. I think if Miles tries to fight her outright he'll lose but his invisibility and venom sting could give him the win if used right, and he can probably last long enough to apply those(Ana doesn't have many speed feats). As it is, I'll give Miles the edge.