I'm not convinced. To be honest, I think your grasping at straws.
It may seem so for the vampire part.
But we
know that someone was seen fleeing.
We
know there was a ward and murk, a vaguely familiar magic.
So it means with a high probability that either Marling, Elaine or Maeve were behind the scenes.
Considering the type of magic, the vampire cluebat, and the fact the Maeve was in Chicago, Meave is by far the favorite.
Poll