Reclassify Mordo as a Dimensional Being
Mordo's own description says his is in his astral form
Mordo’s astral form ensures that every ability properly activates, resisting against Ability Accuracy effects.
This sounds like to me he is moving between the physical and astral plane which sounds a lot like moving through dimensions a lot like Magik going in and out of Limbo.
It would make sense then for Mordo to qualify as a Dimensional being.