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

We should also consider increasing the damage of Death's regular abilities.

The damage to one adjacent target should be 1.5-2 times greater than the standard unit attack against an enemy with average defense (12). This is if you want a powerful ability.
If you want a regular ability, it's enough to make the damage equal to 100%; in this case, the advantage will come from the retaliatory strike, and perhaps the ability will hit someone else besides the one target.

Also, it should be taken into account that if the opponent is afraid of the shriek, which can only be performed from a stationary position and only when there are enemies around, then in fact, such banshees will be able to shriek even when their stack is half-destroyed, if they even survive until the shriek.