I finally realized that the chances of someone mis-pricing a great item in the AH is FAR FAR greater than that item dropping off a monster - even farming extremely efficiently as a DH in act3/4. Most or some of you already know this, but for anyone out there still delusional like I was, here's my totally obvious but elite tip: if you want to actually gear up, you camp the auction house, with specific filters, and hope the right 1d12hr rare comes up. Sorry to crush anyone's dreams of thinking it could be achieved through regular gameplay.