Day of Fire Tears – “All 5 Missions”

I think, like many others, I started playing a campaign made by a Russian player, "Day of Fire Tears." I created this thread so we can discuss it, talk about all the missions at once. I can't get past the third mission. I completed the first two without any problems, but the third one is giving me trouble. How do I defeat the nightmares with an army of 101, and then capture the demon-guarded castle?:confused: