I do not understand---it says you are Anglican. I do not know very much about them, but if you are Christian, I don't understand why you're even asking the question. Just before I came back to God I was getting very deeply into Tarot and had gotten my cards and beginning to learn. I'd had several readings. It was the first thing I walked away from. Why do you care, or even listen to what atheists or agnostics have to say on the matter?? Are you or are you not willing to walk with God? If yes, there is no question that the cards go---if not, then go ahead and use them, and listen to what non-Christians have to say. Why are you asking for advice on a subject that God has already said no to?? The choice you must make is not one of cards---it is are you with God or not--if yes, then do as He says. Throw the cards out and read your bible instead! Right now!!!
This is not a matter that I will engage non-Christians about.