Log posted.
I exited the game after seeing a friendly AI attack. This time, the enchantress was the AI target despite what I said above. So disregard that bit
The log does make reference to Treasure Map 2 as a target. Is that an object located near the fireplace? Can't recall...
edit: They're definitely swinging for Treasure Map 2 (which I now see in the roll window) but sometimes hit the friendly caster. Found a few threads at co8 regarding problems with the object (which I now understand is a spawner). Perhaps your targeting additions are interacting with it.