I agree with Cabert about the city planning - take the inland city first, especially if you think everyone's favorite Queen Gone Wild is close by. How long did it take for her to reach you? It may seem a little far right now but you can leverage your Gems for the extra coinage to make up for the higher maintenance costs. In the meantime, keep a close eye on Kublai but maybe try and get Fish City's Ivory Towers settled before you really get into the military buildup for attacking him. EDIT: OK, so I'm a bit behind the curve today. I guess I should say I agree with EVERYONE who said take the stone city first.