Edit: Metrics are Economy, Military, and Population
Iron Islands: Besides the navy they are useless
Dorne: Small Population, isolated culturally and geographically. Redeeming Quality is Oberyn Martell
North: Sparse territory, controls much of the timber and lumber and has White Harbour and a good population.
Crownlands: Small Population but dense and huge trade opportunities. Possesses King’s Landing, Duskendale, and other large settlements.
Riverlands: Fertile, but always destroyed by external powers. Valuable to trade.
Stormlands: No cities are or particularly large towns. Fertile enough, has a small population and army, but historically great commanders.
Vale: fertile, defensible, and has a strong army. And of course it has the Rohirrim, I mean Winged Hassars, I mean Knights of the Vale, sorry about that.
Westerlands: Genuinely Magical amounts of gold from mining, and a large army, controls Lannisport
Reach: Has the most food, has Oldtown, and has the largest population and army.
Historically the center of the Faith.
This has been edited original order was Reach, Westerlands, Vale, Riverlands, Crownlands, North, Stormlands, Dorne, and Iron Islands