Quote Originally Posted by I_damian View Post
As the Pahlava you mean? The cities you take won't rebel. You exterminate them, destroy the old government type and barracks you can't use for recruitment and garrison them with a single unit of archers with low taxes. Their population is so low after the extermination that they do not rebel. You don't need to abandon your two starting provinces if you don't want to but to be honest, they're crap. You're migrating nomads who eventually become the Parthian kingdom. You could abandon them and make your capital at Persepolis and be like ancient Persia. Or you could make it Seleukia/Babylon and supplant the Seleukids.
The problem with exterminating is that it will take longer to replace the Seleucid governor's palace than it would normally do. This causes a culture penalty for you (lowering public order) that won't go away until the town expands in size and you replace the Seleucid building with your own palace. So I generally Occupy in Towns, Enslave in Large Towns, and Exterminate in Minor Cities and above.