Practical Kabbalah is more along the lines of ceremonial magick wherein success is highly subjected to the materials, sigils, intonation and prayers being in harmonization with the Will, very akin to John Dees Enochian system. Hermetic Qabala included
where as this "Authentic" Kabbalah dubbed as Lurianic, is much more invested and pure in its nature drawing current almost solely from Isaac Lurias biblical commentary and contribution on "Holy" Jewish texts ,i.e.. -Sefer Ha Zohar -Torah .etc. whose purpose is to correct the desires of self to attain the upper worlds from which all things stem from and are ironically concealed from our senses. attaining the equivalence of form to GOD/ADAM by group study/bestowal reveals the essence of our soul though *US* and corrects our individual state to that of a Whole Soul. which is 1 of 600,000 in existence.
As for the Shem Ha Mephorash, Realistically its as practical as it gets. however, invoking these names without proper preparation or selfish desire will do nothing at most, and Humiliate you at worst (or best). Considering you must exist at a very high spiritual state to even attract the Kedusha therein. Mind you that Moses used these forces to bring an entire nation out of bondage. HaShem and he worked the impossible, thats because he represented Chokmah, pure bestowal for the sake of the creator, The Point in the heart must develop to pure altruism and all gain for the sake there of.
So remember, What you put in is what you get out. Shalom