Average Dwarf

If you don't attack the Tanners, the Rune of Battle Fury will be unavailable to them. What prevents you from developing the Dark faction using Humans, or even Elves, and letting the Tanners attack their own units?
In general, prolonging the final battle to 3 months on a small map is a clear imbalance. This quickly diminishes the advantages of some factions, while others, like Dwarves, gain an advantage. The optimal duration for "Old Friends" is one month (clearing the dungeon in the first week, clearing the center in the second week, and then preparation and the battle).

This Berserk Rune becomes available after the death of 1 unit, while the Battle Rune is available immediately. At the same time, the Battle Rune does not work on its own stacks when they are under its effect. Any upgrade of Tanners is primarily countered by positioning, as the damage to a single target is not very high, but if you allow them to simultaneously use the Battle Rune with Berserk and cast Lightning spells on the entire army 6 times, then it's game over. In a prolonged game, Humans under Axel and Elves under Wing look more serious than Dwarves. Higher-tier Dark creatures are somewhat unreliable against Dwarves, as their stacks are strong, and they cannot deal much damage to themselves; Light creatures should be present, and there may also be Dwarven resistance