For some this is a question of opinion. For me it's a question of existence--there is no best vampirism map, because none of them are good.
However, you might like Dracula's curse. It's much simpler than any of the vampirisms but its quite balanced in terms of the vampires and humans. There's no OP/hidden tricks or cheats. No teleports to bases. Just walls, towers, gates, your wizard (the builder) and eventually a paladin hero if you make it that far.
Dracula is reasonably balanced--the game is often decided by how greedy the Wizards are and whether Dracula punishes them for it.
The downsides of the map are it's super easy to troll as a Wizard because once you become a vampire, all your allies bases' are revealed to Dracula, and Wizards can kill each other's buildings or destroy trees (natural walls which can't be rebuilt and only wizards can destroy).
But I suggest trying out Dracula's Curse (Gold). You might appreciate its simplicity.