[Lazy_Perfectionist]

Here's my tip on fighting undead.

You're likely to have a lot of Tungalik's on hand, but be uncertain how to use them. The answer depends somewhat on what undead nation you're facing.

Ctis and Ermor both get MR boosting prayer. While Pangaea does get special prayers, but no MR boosts. And then there's nations like the Ktonian Necromancers, who get no special prayers.
Among the last two, Banishment is effective, but against the Tomb Kings isn't likely to be enough on its own. That's where Dust to Dust comes into play. It's easy to overlook this level one spell, but it will continually prove useful throughout the game. It does 22 damage, with a range of 25, and is both armor negating AND ignores magic resistance. And did I mention that it attacks the entire square?

It's main drawback is its low precision, but you'll likely have a bunch of death mages on hand, there's little friendly fire, and undead tend to travel in groups.

I've used four Tungaliks (with support) to just ravage four Banes. Needless to say, I got the better part of the bargain. Because it's area affect, its not a total waste against MR boosted skeletons/skelly cavalry either.

it's effective against LA Ulm's Ghoul Guardians, too, and several other late age units.

If you've got Angakok, Cleansing Water looks similar to banishment, but with two key differences. First, it is not negated by magic resistance. Second, it has a fatigue cost, but that only comes to about 13 with 3 path water and 3 encumbrance. It's a handy method for clearing out lesser undead. That unfortunately takes until Evo 6, but don't underestimate the utility of Dust to Dust, available much earlier.