Fig. Map. How to play as the Dungeon faction?

Here, look. Let's take Sinithar. He starts with 10 mana and a spell. Quickly get Education, Attraction, and Chaos. There are several mana wells, a Crystal of Revelation, and a magic spring on the map. In total, you can gather 60-70 mana early on and confidently attack a Haven castle with just Lazutchegs. I wouldn't say they're weak. Vittorio's ballista won't save him here. Quickly eliminate the archers, griffins, and swordsmen. And finish off the peasants with the Lazutchegs. No, Vittorio is definitely not an option here.

Added 1 minute ago

The problem is that the Warlock will have mana issues on this map, and quite significant ones...

But what about the magic spring? What about the Crystal of Knowledge? What about the well in a convenient location?