[triqui]

Best blesses in my opinion are Water and Nature, becouse both boost strongly defense and offense. Water gives defense and quickness, nature give regen and berserk. The type of sacred means you might preffer one or the other (troops with a good def to start with will like Water more, and troops with high hit points will like Nature). However, nations with good sacred mages love Earth.

Death is probably the less useful one.