Kalarhan, I'm not looking for an easy mode. I tried bumping my difficulty up a bit and it seems to be exactly what I expected. I will probably bump it up a bit more in the future now that I know how to play. Under ordinary circumstances, the difficulty is fine.
You'll also note please that I beat this battle -before- posting on the forums. I'm not saying wah, I lost, game is too hard, make it easy. It has an easy mode.
Campaign battles don't use the ordinary battle mechanics. That's the first thing to keep in mind. Ordinarily, if I get low on health or my troops start being stupid, I can pull back. I lose some renown, sure, but I get some health back, my troops regroup, and my horse recovers its full health. Now, this is the important mechanic for this battle.
In this battle, I can't do that.
For ordinary battles, and for the other battles in the campaign that I tried (I finished the campaign since my first post) the mechanics are fine. For the battle of Aescesdun, and only for that battle, the mechanics of campaign combat are broken.
This battle is not like other battles because ordinary battle mechanics don't apply. Check out the save file I posted if you want to take a look at it. Use whatever difficulty you like. I get that you're an elite, hardcore player or whatever and you can kill all 1600 enemies by yourself. Give it a try, see what happens.