On a broader note, why is everyone so obsessed with going toe to toe with a blender vampire lord? Why play to the strength of the enemy? If he's in a unit of black knights just try and redirect the buss while putting everything into killing the Terrorgheists and other nastiness! Your Old Blood should stomp the crap out of that stuff, Bane Head or not. Let the lord's unit overrun into a saurus block so you get a magic phase before the combat, then either hex or buff the hell out of a unit as appropriate. You don't need to kill a single model, just survive and let the CR kill off the enemy. Actual kills are gravy.
Pyre