If I wish to consult a deck about deep spiritual issues, then I need to believe that the deck was designed with such topics in mind. (I.e., use the right tool for the job.) I trust that the Rider-Waite (Albano-Waite) and B.O.T.A. decks are more than equal to the task, since their authors were considerably more spiritually savvy than I, and they incorporated that spirituality into their decks. The Wang Golden Dawn deck would work too. I could use the Thoth, but I connect better with somewhat more realistic imagery.