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Well, in the 5th game, this was the main tactic for Inferno. Don't you think? In the 6th game, the situation is even better, as they added low-level archers.
And also, I really liked the unique building-teleport. It's a great thing in a strategic sense. Although it's not overpowered, of course.
Oh yes, in the 3rd game, demons also had castle gates as a building.
And the worm also seemed interesting; does it really not attack its own units?
By the way, necromancy also depends on the initial size of the army (the percentages are almost the same as for the gates), and at the beginning, it's almost useless.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!