I went with another quick revision. Further draw tests, while quite nice, left me worried that I would be sacrificing too many of my creatures for only a nominal gain, and half the time in a way that could be limited by protection. Instead, I pulled the two copies each of Bone Splinters and Rite of Consumption and replaced them with four copies of Geth's Verdict. This bent the curve upward slightly, but it keeps a loaded low end at 15/13/3/5/1/0/2, for a 2.28 average cost. The benefit of forcing the sacrifices without a loss of my own creatures is evident when on considers that three of my creatures power off of my having five vampires in play, and two of those benefit all vampires. Fewer things die to power Blood Artist and Butcher of Malakir, but those seem like small trade-offs.