Ah right, they start at +2, not +4. I was at work and not able to concentrate entirely on Dominions for some reason.
Something about Windohs XP malfunctioning and wasting hours of time trying to repair it.
Ah, but I will offer the opinion you expected that +2 Defense can be a "better" blessing than +2 Reinvigoration, especially if you have holy troops which already have a good Defense rating. Of course, it depends what you do with the blessings.
PvK