A Wight mage right next to my capital - interesting. Though quickly solved with mighty Ulm army, of course.
To Septimius:
Yes, as I said, I think that rainbow nation is a better candidate for merc. And I don't think that adding to them spies & other option via map editing is the best solution. Of course, I see that Atlantis could be a good possible candidate due to their underwater safety. But in LA with R'lyeh present that isn't longer the case anyway.
To Stagger Lee:
Thanks, I may also pay a visit when I have time and inclination.