Small stone walls are much easier to defend than medium stonewalls

[soibean]

I never even bother building stones walls. I honestly find that building the wooden palisades and maybe their upgraded form is the best. That way you dont worry about men getting stuck on those damn walls. You dont have to worry about sap points, which I havent faced in my new campaign.
All I ever do is set up two or three units next to the spot I assume the rams are going to hit. Blast that with fire arrows, if it explodes move down the line if not reinforce. Then once all of the guys are tangled, make sure all enemies are in combat mode. Continue firing fire arrows and lead some cavalry or heavy infantry out the side entrances and into the enemy flank = rout.

These walls are so easy to defend and assault. Stone walls just take longer to assault (meaning two turns instead of one in order to build more siege towers) but are no harder. I honestly cant think of a reason to upgrade the walls beyond wooden except that I dont like how wooden walls really look on the campaign map

why do you guys upgrade beyond wooden? just wondering