with Necromancers being a substitute for Sorcerers and clerics staying priests,myself I don't use sorcery much,but can use priest then and then. I mean it sounds very reasonable that Sorcerers would be GM in Dark and Priests GM in Light ,but for players who like Magic a lot any such limitations ,however logical they are,of course,can be seemed as non-satisfying .Sorcs don't like or care about humans that much as Priests do -why should they have GM Light skill reserved for Saints only,
and Priests are too emphatic to be all the way long into vileness of Dark Magic-as only dedicated Necromancers with their spite for living can do. This is logic ,of course, you are free to game as it suits you.
