The worst units in the Fortress are the Golden Dragons. It's a paradox, gentlemen, but it's true. They are very difficult to build and upgrade. And in battle, they are not very useful. You can't cast Artimagic on them, you can't resurrect them, and their explosion can be countered. If you have a vulnerability medal, then they are very effective. And, of course, they are also great with Armageddon. But the other units are good, except for the Pegasi, which are not suitable as a combat stack, but they have many other uses. And the heroes in the Fortress are also excellent.