Mistakes when playing as Humans.

Mortulus is writing such nonsense :D

The start for Haven isn't with a ballista, but with archers.

Red ones? Maybe. But until the first serious ranged unit block, or magical one. And in the maximum gnome build, your archers will be taken down by warlocks with pre-cast spells.

Although Dugald will definitely outperform Vitus in such a situation, yes, but he is the only one who is a record-breaker.

There's also Rutger.

deals only 300 damage

Is that not enough in weeks 2-3? O_O And you don't really need an army. And this damage is dealt by the ballista, not by a specialist. Vitus will be even scarier.

The tent is useful at least because it can remove blindness or confusion, but the ballista...

If you don't kill the ballista right away in the final, you'll have additional problems. It will deal with any archers without any difficulty.

How will you clear neutral creatures on adjacent territories? With machines?

I killed 90 Death Messengers and then 178 Nightmares in the early fourth week, having 10 Cave Lords, 31 Succubi, 13 Nightmares, 64 Demons, and 48 Imps in my army. The hero had about 12 attack and, I think, 6 defense. Grok. You won't believe what I killed them with :D