Earth4 is fine and all, but reinvig1 is pretty much useless, oh boy, 1 whole fatigue point back per turn
You don't need earth4 for fribolgs do you? Rainbow blessing is interesting if you are making a rainbow mage, but unless your sacred troops are going to be used in quantity its still probably a waste from just taking lvl3 in the same paths (for searching lvl4 only gets you ~5% more sites, and some of them arn't that great anyway) and boosting your scales or dominion.
Playing with high blessings and lots of sacred troops is fun though, competative... I dunno, SP its fine, MP, I'm not sure there's been enough data to really show.