One thing's for certain.. I'm done with using Cavalry. They suck. Always get ripped apart even with good settings! >.>
Well, I don't think they suck. The defenders were using box too, but since the attackers didn't have a whole lot of archers and the defenders forced the attackers to sit in a lot of withering archer fire for so long that the Cav took losses. Really, the biggest problem was that the Cav didn't get to charge. A lot of units broke out of their defensive position and stopped them from charging, negating the hit boost.
That could've been fixed by a Cav Charge, or the all out charge opening by the attackers, but you didn't have a huge amount of Cav that could've stood up to an infantry wall defense for at least one round. So it was a lose lose for the attackers that time.