Which set of artifacts is the best?

It’s great to have the Book of Earth and the Book of Air. Also, a fifth-level magic hat is useful. Good artifacts that increase creature speed are also helpful. And it’s even better if you’re playing as Galtran or Shakti, with artifacts that increase creature health. A spell that prevents magic is very effective. The Morale Suppressor (Spirit of Despair) is simply amazing, especially for the first or second week!