@Lxndr et al.: I haven't been able to debug the Source agents issue without actually doing that path, so it will have to wait until I get there -- which probably will be within the next couple weeks, hopefully. The agents are correctly flagged as "dodge 1.0", meaning that the "attack" action ought to have a hitchance of 0%. Something about that is evidently not working correctly.
@Magus: Why is the Fry damage reduced to 1? I read the relevant Wiki pages but see nothing to indicate that monsters there have any special immunities. Elemental resistance from +ML is capped at 50% so that's probably not it. Whatever the reason, it's clearly something BatBrain doesn't know about.