I agree with the guy saying the Scots are the hardest. Honestly, I will probably get flamed here for this but I find that spearmen/armored spearmen are close to absolute crap. I am not the best player ever but I know how to keep my lines from breaking and the spearmen will rout every time. EVEN AGAINST CAV.

If it wasn't for the mass horde of Merc/Highland Clansman combo, I would have never won. Oh, but toward the end, going up against the Saxons didn't seem all that tough.