Just a theorycraft, but one I will definitely be queuing up on Day 1. The goal is to recur that delicious Albatross (and, to a lesser extent, Weasel) deathrattle as many times as possible, then to use Shadowreaper to finish off the opponent once they're stuck drawing useless cards. Shadow Visions can only get another Shadow Visions, Twilight's Call, Seance, Embalming Ritual, or Psychic Scream, so there's guaranteed to be some sort of synergistic outcome from the spell. Volazj can be substituted for Benedictus if you feel like the deck might fatigue too much, but in my past experience with Weasel Priest people usually give up before that happens.
REVISION 1: Decided to drop Volazj and an Embalming Ritual for Benedictus and Bwomsamdi. You get to draw all the Weasels your opponent has put back into your deck (including the ones Bendictus copied), so you can replay them again and again (particularly after you play Anduin).