[HoneyBadger]

Actually, it's not for the Niefel Jarls at all. It's more for the Niefel scouts (which are holy) and the regular Niefel recruitables. Astral 6 is plenty, though. I only go for 8 Earth/8 Astral because they're cheap with a Great Enchantress.

If you want a really fearsome Bless for Niefel that works well in the longer term, try an Imprisoned Enchantress with Earth 6, Astral 6, Nature 4, Fire 4, Air 4, and Death 4. It requires a certain amount of spell support in the mid to late game, but it's enough to thrash the early game, without sacrificing too much in scales.

I'm working on a Niefel strategy guide right now, though, which hopefully will lay out Niefel strategy a little more clearly than has been done before.