First of all, great mod. Many thanks.
Secondly I've checked on the forum about this particular ctd and didn't find anything, but may be someone already posted this and you are aware.
It's about Emporion I think, it's called. Everytime I try to attack it, then the game ctd in the battle screen loading. Every single time. I've checked and there are no Marsella hoplites in there, so it's not missing textures or anything like that. On autocalck it works though, why wouldn't it?
So now you know. Cheers.