Okay, I'm going to operate under the assumption that most cities with vegetation are going to be similar to M'alo in that they have wealth and some sort of army/defense force. 
I take it that the cities with several eco-generators will be a tier below, but not impoverished, and that the distribution of wealth is proportionate to the number of natural resources they have, and then the number of eco-generators surrounding that city. 
For example, the town of Kol'uira is most likely the poorest city due to the fact that it only has one eco-generator, has no natural resources or mountains to protect itself from invaders, and is also right beside Kaz, and the northwestern city by Oden is fairly rich due to the fact that it is smack dab in the middle of all that vegetation.