You want to start with swords and take the tower. You have the advantage over cats but make sure you watch out for bombers (split your units when a bomber comes near). Don't over commit to swords however, you need to tech up at some point. Make archers to secure your grip but again watch out for bombers. Walls are very useful against chaos, you can build these for your units to fall back to when pursued.
You want to attack early against deads (with your speartons) before he gets a large number of them. If he gets a lot of them then you want to defend. If he doesn't have a lot of deads but he advances, he's putting himself at risk as deads cannot retreat well. If he gets wings then chaos will be on the offensive. Make the usual army, but make sure you don't lose a lot of archers or you will lose.
Wings generally require more micro to fight, but they aren't as effective against a turtle. If chaos deads make it to your base, it will be very hard to push them back as a large number of them deal a ton of damage and they have a lot of health. Even merics can't heal against a large number of deads.
