LogFAQs > #968489547

Enemy AI in the two games on DS prioritize doing damage above basically all else (they also essentially assume they will always crit on anyone they have a 2% chance to crit). With bow/magic units generally having lower defenses, they will tend to attract a lot of attacks because the AI doesn't really care about what you can or can't do to it in retaliation, they only care that they can do more damage than they could to anyone else.