Let me first say I am having a blast playing Elemental,
Now then, while I understand Kingdoms use horses and the Empires use wargs, for the life of me I just can't understand why they couldn't have some mutual usage.
When I am playing my death-worshiping fallen race hellbent on returning a titan and I pass by a refugee camp that is somehow immune to all my powers as an evil sovereign, I can't help but wonder what a good source of food that could be. Yet the refugees can not be harmed by me. They can not be forced into some sort of facility and turned into titan treats. Similarly, as a good noble leader of the nice and fair Kingdom of Nicefair, I see a group of wargs that live near by my northern most city and think of how prestigious it would be should I set up some kind of hunting lodge and allow my nobles and foreign dignitaries to go out and hunt the dangerous beast.
I think you get where I'm going with this. Creativity, they will call it "titan treats".