In Pamaltela, the Chaos is far less present than in the North. No armies of Broos, scorpion men, Walktapuses, Gorps, ... (except in the far sourth)
Why aren't there no priests of Chaos (Thed, Malia, ... You name them) traveling south and starting to build temples, create broos, spread the Chaos there? Whty are they so attached to the place where they have a strong resistance (Storm bull, ZZ, Orlanth,...)?