[Shovah32]

Since losing ethereality i would say that no, vampires arent worth it. LA Ulms vampire counts(possibly with a few lords) can do some fun things with magic but generally there are just far better things to do with your slaves.

EA Lanka and EA Mictlan are your best bets for EA blood(with pangaea, abysia and the 3 'heims also having access to it).
MA Abysia is probably the main blood nation around but again, the 'heims also have a bit of blood.
LA Blood comes back with a vengance with the nations of Mictlan, Ulm, Abysia, Marignon, Utgard and Midgard(i would rank them in that order) all using its powers.