__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
Zannah's defenses are simply impenetrable. The fact she can lose against majority of the opponents she fights is proof she can handle Malak's lackluster combat abilities and physical strength. Even though he resisted the Star Forge, Zannah's illusions should easily overpower him because it almost did the same for Darth Bane but failed (the latter part isn't that relevant but whatever). Zannah dominates.
__________________ "There is only Revan. Only he can shape this galaxy as it is meant to be shaped."