I think they would be a great addition like they would be an expensive unit to buy and you would have to pledge to get them. the reason i think you should go through al the trouble to get them is because they are a big and powerful unit to have and the fact you can have archers on the back of them or a base is reason enough to make them hard to get. this juts an idea i think the mod would be a little better if we had them because we did see them in the movies. i hope you take my idea into some consideration