But following mythology Dominions vampires have always been far scarier than vampires are ordinarily represented.
How many stories have you heard of blood drinking women in nightgowns taking on whole armies and beating them, straight up in a fight?

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Generally in literature even a small party can beat a solo vampire.
What would be nice, though, is a reduction in her path costs. 50 is too high; i'd like to see somewhere in the range of 20-30 per new path. The VQ could also have Seduction, and all Vamps should, perhaps, have glamour. All Vampire commanders should eat a few pop per turn as well.
We chould also have some summonable Vampire Princesses as well as if you give them seduction.