+10 unrest is nothing to scoff at, especially at places like Halikarnassos (which has significant base unrest to start with.) I should bring them back and follow Fluvius' advice about keeping them in the homeland, but that +10 unrest is just....

If I recall Marduk gives about as high Law bonus as Seleukos, but Atargatis should be favored because it gives decent law and trade to boot. If only they weren't so prone to getting unrest boosting stats.