Using "Enemy Unit" as the target type in many spells prevents interesting interactions during combat. The worst thing is when an AoE spell cannot be cast because friendly units are in the way. Mantle of Fire should damage friendly units that are attacking me due to being Clumsy or Dominated.
The simple solution, which I just finished doing myself, is using the "Any" option instead to increase the interactions of magics in combat. Might want to do this more often, unless Enemy Unit is being used for a specific reason, like when casting Dominate.
