Good showcase! I find the orc architecture to be very unique. elves get trees, humans get your classic medieval look, and orcs get interesting ramshackle huts and structures. I really like the orcs in general because of their fierceness and cool units and buildings.
And one question, is one reason why the impalers get trained at the pyre because they have to grab a long, pointy stick from it before they set it on fire, so, you know, they can impale people with them?
Picture made by Aametherar the orc (Elves are the best!)