RTF is a global modification that replaces all towns in the game.

in reality, the solution is simple – replace the other dwarves! at least we have a model of a dwarf infantry unit with the same scaling, and after that, we'll have to get creative.

Added 42 minutes later
in fact, dwarves have berserkers, so we can put a dwarf berserker on the third level, but we'll have to get creative with the mages, because if there's an elemental dwarf giant on the sixth level, then the mage could also have magical mutations.