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I played the Master's cards, and I remember very well that the neutral units are placed randomly and right from the start (I'm sure there's some algorithm involved), which, in my opinion, is a bit strange. The reasons for this are understandable.
And, for example, in this case, I restarted the game several times to see what the random generator produces, and here's a stable: it's one step away from the castle. There's probably a difference, either it's a horde of unupgraded spearmen, or a lot of dark riders or swift riders. And once, I even got a squad of dark riders. And from a squad and from a horde, we can take the same number of vampires. And at this location, the simplest bone collectors appear - they produce twice as many vampires as the riders. In general, there's no fairness right from the start.
Okay, let's see what happens and how much patience I have left.)