The problem with the north is that on one hand, you have Sirion whose cities are clumped together (Sirion City is one region away from Avamar and Sir Temple, and two regions out from Slimbar and Parm, and even these two are one region away from Sir Temple), while on the other hand you have the smaller cities and many badlands of Nivemus and OI. It's kind of hard to center new realms with this landscape in mind, unless they're all in league together anyway.
