K, The First King is H5 to start. (woot!
)
Prophetize him, and he's H6. Sword of Injustice, H7. Crystal Shield, H8 in battle. Then Ekishnugal casts Hell Power, and he's H10.
Lord_Bob, I didn't know the discussion was about Marignon and Ermor. Marginon's H3 Inquisitors should really lay some smack down on the undead hordes. And making one H5 by prophetising & Crystal Shield is a good plan. Trade someone for a few Crystal Matrix too (also only Const4), or take a god with earth and astral to make them yourself, and 4 cheap S1 Chartmakers turn your H3s into H5s and your H5 Prophet into H7.
Banishment at H3 is:
Area 8, Damage 11AN, Penetration+1
Banishment at H5 is:
Area 12, Damage 17AN, Penetration+2
Banishment at H7 is:
Area 16, Damage 23AN, Penetration+3
If you don't like that idea, there's also Inner Sun: 1 in 4 Goetic Masters can cast this. It's Alt3, 1 gem, cast it any time before the battle. Script 5 spells then attack closest, and when he gets poked, he explodes for 15AN damage (MR) with area 35. You want to give the undead time to get rid of their javelins so they are nice and close when you set them up the bomb. You could even try a Blink as your final spell, but YMMV with that. Kind of expensive though. Since you didn't like trading 190 gold for 300 undead, you probably won't like this. If you have indies like a 90 gold Magus it would be better.
Or, Conj-6 will get Marignon some Harbringers. Its ranged attack is Area 5, 15AP damage versus undead, 15 shots.