The SoP uses different energies in a different way, and so the Middle Pillar really isn't appropriate to use with it. There are exercises compatible with the SoP that work with subtle energy centers in the body; the Grail Working given in The Druid Magic Handbook and The Dolmen Arch is one of them, the Bridge of Light method taught in the Modern Order of Essenes is another, and I have a third which will be published in The Way of the Secret Temple and at least one other book.