I love these guys. Don't think of them as standard battle mounts. I use mine to have a really fun time tracking and hunting down creatures in the Ragnarok canyon. Because you can shoot from it's saddle, you can wait to ambush potentially dangerous creatures from the walls and bridges. By far my favorite hunting mount.
You can breed them while they are mounted on the wall. I found it's the best way to breed them because they don't move around. But be carefully their egg goes to the other side of the wall so make sure you have access to both sides.