What do you think about Vampire Lord with wings as allies?
They are fast (move 10"), can heal all summonable units (3 units, D3 heal), cost just 140pts, they have "wizard" keyword for Mistic Shield or Arcane Bolt.
I think of running 2 of them in my "Grimghast horde army". Basically it will be
3x30 Grimghast
2x Vampire Lord
1x Guardian of Souls
This is 1500/2000pts, and I still have 500pts for another "to be determent" stuff