Air bless: useless?

[Sandman]

The air bless is unchanged from Dom 2, and I wonder, what's the point of it?

Only about half the nations have serious missile weapons, and only a few have the air magic to make the lighting resistance worthwhile. An enemy making heavy use of lightning will probably be casting Storm, and not using archers, so there's little synergy between the air shield and the lightning resistance.

For sacred units which have low protection and no shield, the astral bless is better. Twist fate works well into the late game, and magic resistance is always handy. Even better, astral nations can use spells like Body Ethereal, Luck and Anti-magic to further enhance the astral bless, whilst the air shield becomes obsolete with Arrow Fend.

The air bless needs help. Ideally, it'd be a good bless for air nations like Vanheim and Caelum.