hi guys, a simple idea: why don't you insert in all the provinces dungerous ad safe, a fortress?
the idea is to find a fortress to conquist: a commercial fortress. in this fortress the guild that conquered it, can buy diamonds with the gold of the guild.
this will be a nice idea because guild can use its economic power.
maybe the fortresse won't appear in all territories, but in some of them. in the other it will be beautiful a gold fortress, where for each level, the fortress give interest on the gold insert in the fortress.
what do you think, and remember that didn't exist in the history an empire without fortresse to control the territory