Which faction poses the greatest challenge for the Dwarves?

By the way, I don't see any particular weakness in the Dwarves; they have decent chances against everyone. They are well-defended, have good growth, and a large number of hit points. + Runes don't depend on the opponent. In any case, their racial ability will significantly strengthen the Dwarven army. The downside is the huge number of crystals required + a slow start. Therefore, it's difficult to play short battles, especially against Dark Elves.