Grigoriy
It would be preferable to make Mermaids the third-tier ranged unit, but at the cost of reducing their health and damage, since in Ashan they use Water Magic, and they also weren't large creatures before. Also, at least Naiads or Nymphs could have the Seduction skill.
I don't know why this is needed for a mod that is already imbalanced compared to the vanilla factions of Heroes 5, but, especially for you, and with a donation, I can make a special version of the mod where this perversion will be included. Any whim for your money, so to speak.
Added 5 minutes later
It doesn't attack the city because it should be generating an army, but it isn't; it remains as it was defined in the map – one unit.
By the way, in the previous version of the campaign, this bug didn't occur for me at all, but in the current version, it started to occur regularly. And never mind that it occurs – but after I "eliminate" this not-so-hero, suppressing a nervous chuckle, other ones don't even think about coming. I strongly suspect that it's for the same reason. As a result, it's simply impossible to evaluate the new version of the campaign... and the previous one, by the way, I really liked.
"Упорство самурая"
Мои карты:
Сценарий "Ответный удар"
Сценарий "Воронье отчаяние"
Сценарий "Дикий шторм"