Creer Incinerator (Divinity: Original Sin 2)

There infa that thanks to the Hat of the Tyrant, who gives Cleansing skill, you can summon a demon, LVL 7 I think if a few times to use the Cleansing. He did, but downloaded bistream, maybe after you kill it, hat you have no more - and accordingly set the Tyrant broken. He basically not as tough as we're all decided. But it's the fact that after all it would be) But if the other gear is not, (because you'll have to change the whole set, as I have, sold at stupca), it is not.
Has anyone solved the problem differently or is it inevitable?