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I don't think you should even consider the Tomb King when you are thinking about an LA C'tis bless. Tomb Kings are better off summoning.

But if you do need to use one in battle:

- You don't need an F bless, base Att 14 is sufficient, plus you're likely have an AoE wpn, and you can gear up situationally for more attacks or +Attack when needed.
- Air bless is a joke, give it a shield
- W is not needed, defense is high already
- E will do nothing except get rid of your tiny fatigue from Holy Avenger/Bless
- S does nothing for base MR 18
- D is not important for a few melee thugs
- N buys you nothing
- B ... well, Str 18 is good enough already

So, Tomb Kings are not a unit where you care about a bless IMO.

How about Sauromancers?
- E: Cold-blooded units suffer in cold provinces. But just +2 reinvig/turn doesn't help all that much.
- N: They have old age, so a shroud or being blessed in battle will heal up diseased mages. But they also are heavy into death, so they don't get disease from old age as often. Could help with indy mages like Lore Masters.
- D: Not bad, if you do a little Bone Grinding. But not worth building a strategy on.

So, use your pretenders paths to diversify, so you can build your own hammers, cast Wish in the late game, or a global you want, or cast some cool battle ritual like Fog Warriors, that you'd have trouble doing with your nationals. Or use make a strong SC pretender that you can tear up the indies (or neighbors) with. Or go strong scales for massive amounts of Sauromancers and research. But I wouldn't put much effort into even a minor bless.