Apart from moments at the beginning where frameskip is required and some annoying traps this is a pretty good level. The first part of the level you have vampires, no imp spell and no access to gold and you have to carefully claim some rooms, kill heroes until you get to the gems and portal. Frameskip until you are well trained and the best part of the map begins: You have to face a rival keeper who's more powerful than you, and you have to try to get to the prison and get some heroes to your cause without provoking this keeper. He'll try to attack you constantly so reinforcing and building traps and doors is a must. When you think you're strong enough or are attacked kill him. After this part you'll face another keeper but he should fall right away to your now more powerful army.

It's a pretty fun map, especially in the beginning. However, I think the prison and torture chamber should be unlocked aftar claiming them the first time. The endless waves of blue creatures is also very weird, and pretty hard with the new KFX AI.