I agree with Ben (and I think I may have written it, way back when).
If I had to change it, I'd drop the "beat it by 1" bit. You make the EF, you can tell what realm the beastie is aligned to. I like that you don't need to penetrate, it being a divine power and all. I'd also change it to "if you beat the Ease Factor by 5 you gain some insight". Oh, and I'd replace the "creature's magic resistance" in the formula with just "Might".
Ain't hindsight grand?
Matt Ryan