Tell me, what kind of monster is that?

No... you're wrong about Vitya. 1) What didn't you like about Haven's stats for a ballista? 30% of stats go into attack, 15% into knowledge, totaling 45%. Only Inferno has more. 2) Machinists start very quickly because the ballista effectively eliminates low-level neutral creatures, so there are usually no problems with clearing mines. 3) Minimal losses thanks to the tent. So, on small maps, machinists have a decent advantage.