Battle of the Celestial Gates

Yes, I meant the battle with Sigryph. On Light and Shadow and Divine Might, counterspelling works well; you just need to manage to re-cast the spell and grab the Sar-Iss staff. Khan on Zephyr is also decent if you have a large stack of fire-resistant gargoyles with minions. Demons are controlled one by one, countered by hives, and vampirism is negated by mirrors. But it's not easy either. There's definitely no need to make it more difficult. The only thing I'd like to add is that the message about the attack of the last demon should indicate that it's the last one, so it's clear that you can use the limit on it and finish with minimal losses, because otherwise it's too harsh. Although on Khan, you can't resurrect anyone anyway.