Hello everyone, I'd just like to pick your brains for a second, does anyone know of a mod that could make the AI for castle defense a bit less... herp de derp?

I mean, when Im attacking a castle, their melle units leave the walls to attack me everytime, allowing my men to just walk over the bridge they so kindly leave down like a well trained doorman.

So does anyone know how to train these guys to just sit in their walls for 2 minutes?

Thanks in advance :)