Sophie
I don't think it matters, Daizdy. Both are alternative positions, derived from original trump positions. Personally I put the High Priestess at number 2, because I like the idea of her reconciling duality and representing the gestation of what will come to fruition in the Empress. Putting her after the Empress and Emperor places her next to the Hierophant, her natural partner, but at number five, which is both a masculine number and a number representing the human body. But if numerology doesn't matter to you...