The Maskling AI was tweaked, and the targeting range was reduced, seems like I cut it back too far. I'll have a new build out shortly that will have that and other fixes.
Thanks for the feedback, as always.
Edit: For performance, I'm not sure. Bronze Age can use multiple cores, and it is heavily CPU bound. Currently world size is the major contributor to slowness. The world generates as it is explored, extending pretty far beyond visible range. As settlements grow, and especially as warbands or migrants move around, the world gets bigger.