Kage is a psyopath yes, but he also is a great warrior. He managed to break out of jail and then climb to the top of a huge tower without a gun (at first anyway), though if you think about it he was smart enough to know he should give up since there would be no way for him to escape, since the planet was a barren waste land. So no I say that Kage was a great warrior, though he is close to being a psychopath.