)
Don't forget the Elements of Harmony themselves. The ponies, I mean. They battle monsters so often, the rest of Ponyville seems almost used to it by now.
Also, regarding Tempest Shadow. Yes, she was very dangerous, but she wouldn't have been nearly as much without her I-Win button magical grenade. In fact, yes, the ponies rely almost entirely on magic, but so do the villains—and their magic is usually more powerful in direct combat. Or makes a direct confrontation meaningless, like the Knights of Harmony show. Unless you can make your soldiers immune to mind-control, they had no real chance to contribute meaningfully anyway.