Which level 7 creature is the best, and why?

and here, 5 versus 5, the Angels have no chance.

What is this even about? You're saying something absurd. Not only does an Archangel easily defeat Ancient creatures, but if there are 5 stacks of them, the result is obvious. Just think about it yourself; they can still recover. And if your opinion comes from your own judgments, experience, and personal principles, that's your business. Nothing and no one can influence it in another direction until you realize it yourself...

Sincerely.