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Well, I didn't say that it's only good against demons, but its benefit is that you activate the Dark Ritual before the final battle, and it gives you at least some confidence in having mana in the battle. Of course, the Dark Ritual can be useful where there are no mana wells, but on small maps, you can practically achieve the same result by staying overnight in a town, and on large maps, it's better not to choose the Town Enhancement skill:D
Erin?? a candidate for a Warrior-Town Enhancement hero?? with a rather dubious ability and starting chaos??
Sorgalla also has a not-so-great ability; it would have been better if he had a classic special ability for cavalry.
Vaishan and Iranna are basically suitable, but Kifru is distinguished from them by her starting leadership, and her ability at level 3 is also good.
Erin?? a candidate for a Warrior-Town Enhancement hero?? with a rather dubious ability and starting chaos??
Sorgalla also has a not-so-great ability; it would have been better if he had a classic special ability for cavalry.
Vaishan and Iranna are basically suitable, but Kifru is distinguished from them by her starting leadership, and her ability at level 3 is also good.