Archon
Friendly Neighborhood Gem-Collector
I'm currently researching methods of winning a siege, because I can't afford tohave the Iron Legions and unsullied fighting, I think starving Astapor out is the best bet - with such a massive slave population I imagine it would be quicker than most starvation attempts. I imagine the Good Masters would surrender relatively quickly too, they aren't the most courageous of people; and if they surrendered peacefully, they'd be allowed to retain their nobility, and some power on a council. Hell, they could govern themselves, provided the Unsullied were donated directly to New Ghis.