Auto-translated
Again, this is purely theoretical. 50-60 vampires, supported by Lucretia, with a shield, and preventing the opponent from even summoning a Phoenix – that's exactly what I was talking about. Lucretia isn't the most convenient hero; it's too difficult to start with 1 vampire and "spellcasting" with "mana regeneration," plus raising vampires means immediately taking on fairly strong neutral monsters with 10-20 mana. Moreover, she's very likely to simply run out of options – either there won't be the right monsters around, or even worse, there will be monsters from which vampires can't regenerate. Therefore, it's much more convenient to choose Kaspar for Necromancers, or for larger maps, Naadira, Deirdre, or even Zoltan (especially against mages). Conversely, when playing as Nuora, you can immediately spend mana freely and, in the first few days, attack those you would normally save for later. And, slightly off-topic, I see the obvious weakness of any race as focusing on building a powerful army; vampires, for example, won't be able to reach the opponent in one turn and will be weakened by magic and finished off by troops – it's unclear how they'll fight afterward.