If it is easier for you to compare hypothetical practitioners of a particular current against hypothetical practitioners of another current, assume that each hypothetical practitioner has studied for 5 years in order to level the playing field.
In order to tangibly quantify and simplify such a herculean and complex task, pick a few currents you have at least some experience in and use a 5 point rating system for each criteria point. 5 being the most practical/dangerous/potent, one being the least.
Let your biases show, but feel free to add a short little blurb explaining your evaluation of a current if something in particular stands out to you. Try to stay away from currents you are not experienced with.
Path of Smoke- Practicality (3), Potency (5) Potential for Growth (5), Danger (5), Dogma (4)
Qliphothic Magick- Practicality (4), Potency (5), Potential for Growth (5), Potency (4), Danger (4), Dogma (2)
Vodoun- Practicality (5), Potency (5), Potential for Growth (5), Danger (5), Dogma (4)
Right Hand Path Qabbalah- Practicality (1), Potency (2), Potential for Growth (3), Danger (3) Dogma (5)
Demonolatry- Practicality (4), Potency (4), Potential for Growth (5), Danger (3), Dogma (2)
I gave the Path of smoke a 3 in practicality because it relies heavily upon fetishes that can be difficult to obtain (large amounts of soil from underneath a tree struck by lightning and/or graveyard, a living snake to be sacrificed etc.) I gave it a 5 in potency because it is one of the most powerful currents I have ever experienced. etc etc
I have Qliphothic Magick a 4 in danger because health risks may manifest in your life and quite honestly the forces of Gamaliel nearly destroyed my life during Lilith’s vetting process. etc etc***
The idea is not necessarily to say one current is simply better or worse than another, as we all know each current excels in different areas (much like individuals themselves).