[Pocus]

the main point, for me, about magic scale is not the modification to MR. The most important feature is how it modifies the points you get from your researchers. Going from magic 0 to magic 3 will double (3 to 6) the RP generated from a Pythium theurg, or Mictlan priest. And they cost less than 3 gp upkeep of gold. You see the trick? Reaching overland spells like a flames from the sky (waste an enemy army) when the others are still struggling with level 6 in research is something of interest.

Another point is that you spend less fatigue. -30% in magic 3, in combat (for spells). Something of importance too, and can lead to a whole range of strategies.