How to break through the Gate of Oblivion on Jebus in week 2?

Let's count them.
1) Factory
2) Knight
3) Heroes of Might and Magic I
4) Monks
5) Angels
6) Stable
7) Hippodrome
It all adds up. But I don't see the point. If you have a lot of money, it's better to build a Stronghold and a Castle instead of horses.