Catapults

The best designs are for the Tribes of the East, in my opinion. Inferno also has some good ones; who said that their methods of destroying fortifications have to be conventional? A strange creature spitting fireballs is perfect!
The humans and demons have nonsensical decorative elements. Clearly not for war; they are too elaborate and miss the mark.
The Necropolis just has a ridiculous spider; they've really gone off the rails with this theme, it seems.