I don't think the rule is modern religion so much as any religion ever...

Roland closed down a thread because it was a discussion of Greek gods in their literary portrayal and this counted a religion...

OP: When I first tuned in, I was hoping for something to make it worth keeping Int and Wis as non-dump stats. What you have here is just an emphasis shift. An expensive one.

As another possibly line, there was a feat published [OGL] by AEG some while ago:

Something about being smart...
Prerequisites: BAB +3, Int 13+
Description: When facing a target with a lower Int score than yours in melee combat, you may add your Int bonus to hit and damage rolls against that target.

Not ridiculously powerful but darn useful. Might want to up the BAB requirement to taste, but you could spread this basic idea reasonably easily.

Attacks: Int based and Wis based
Defence: Int based and Wis based
Other stuff: Your threatened area counts as Difficult terrain against targets with a lower key stat than you.

Anyone got any further ideas?