I'm finishing work in an hours time hopefully get chance to produce a log for you.

The force dx9 is already in place. On 1.3 it removed the lag almost completely

I noticed this without saving

I had the same issue on campaign level 10 where you're at bottom of map and kira is at the top and you have to destroy kenos (or pillars of light) can't remember....anyway

After building a significantly massive dungeon with only access to chasm is near the mana shrine to the east. Every other part of dungeon I left walls in order for my creatures to develop to level 10.

After maybe half an hour play time almost all my creature (beasts, imps etc) just seem to cease activity including looking after their own wellbeing, this causes them to fight each other and then leave, imps don't dig, don't fill tavern, drag unconscious back to beds, fetch corpses, nothing, not even build defences or constructs.

I think it has been fixed as of 1.3.1 update but will have to double check