NHF – new heroes for Heroes V 3.1.

I think the focus should be on tactical diversity, not uniqueness. Of course, it's not good if the tactics overlap, but in this case, there is no such threat. I don't think playing as an Orc Mage will be similar to playing as a regular Mage.

Of course, it won't. Zero spellcasting and no guild...
Why is such a fifth leg needed?

Added 2 minutes later

That's right, in the version that is currently implemented, she is precisely a female warlord.

Is that Gothai's special unit?

Added 2 minutes later
I think it would be better to make her a neutral hero, available only in the tavern, and make her stronger from the start. Then you can give her anything. It would be like having a Haven faction, Orc cities, but to prevent her from getting the racial skill, you would have to remove it.