"Necropolis" - changes to creatures of levels 6-7.

There was no coefficient at all, hence the suggestion to increase it by 5 times, not 10.

This is either an error in the fan manual, or it was like that in 3.0.
In 3.1, there was definitely a coefficient of 2, and this is reflected in the 3.1 fan manual.
So, what you are suggesting is equivalent to increasing the wail by 2.5 times compared to the original, which, considering the increased range and direct damage from the attack, leaves this ability in the same state as it was before.

If you're afraid of Banshees, don't go into the forest. The version presented in this mod is mild and very much a compromise; I was actually suggesting that the wail should be twice as powerful as the direct attack, which would correspond to a coefficient of x20 (not x10). And here, against a unit with 12 defense (which is an average defense for units), a Banshee deals almost the same damage with a direct attack as it does with a wail. And you can always use the example of Archangels with 30 defense and bring up examples with some peasants with around 0 defense, against whom it is not profitable to use the wail.