[Terra has to pause and think about that. Most of Kefka's abilities are magical, after all.]

Well, he may not seem that way since he lost his sanity long ago, but he is a proven military strategist. It's partly because of him that the Empire was so successful. He's also very good at reading people and getting them to tell him what he wants to know, whether through interrogation techniques or mental manipulation. The best thing you can do is not to underestimate him. He is insane, but that doesn't mean he's lost his intelligence. If there's a way he can take advantage of a situation, he will.