Walkthroughs for custom maps.

and there's another trick when attacking a Castle:
If you have even a small stack of Archangels and they have the first speed, then by pressing "wait," the AI likes to cast Blind on these Archangels. Basically, if this is the only stack and the towers are awake (the catapult is destroyed), then this is a simple and quick way to leave the AI without mana and doesn't even require a dispel.