About the energy paradigm
In the energy paradigm there is a belief that everything consists of an energy coming from one universal source and if you are able to control that energy you can control reality.
The whole idea of the energy manipulation is very interesting, especially if you consider that it is hard to predict what will happen if you move energy from A to B. For that purpose the energy paradigm has to borrow from other models For example when you use affirmations during energy work you have fused energy paradigm with either psychology or information paradigm, if you have ever done LBPR, you were using combination of energy and spirit work (divine names used as words of power).
A brand on its own
It would be unfair if we spoke about energy work only in comboination with other models as there is one nice addition, being purely energetic in nature. There are various correspondences splitting the energy into different shades. You can then work with the shade closest to your desire. These shades can be divided into elements (Fire, Air, Water, Earth, Akasha), planetary energies (Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn), alchemy principles (Mercury, Sulphur, Salt), or simply dark and light.
A mistaken theory
As I have said before, every occultist at least once tried some of the versions of LBPR as can be found on the internet and to all of them it worked, sometimes better and sometimes worse. Because I currently have no clue how to proceed further in this article, I will just spill some secrets as I used to do in the Oath Breaker series (sorry for honesty).
Lesser Pentagram Rituals are intended for learning to control and feel elemental energies. People like to use banishing pentagrams in these rituals to banish "evil" energies, but that's not really how that ritual works. Yeeees, you can use LBPR to banish, but at the same time you are bringing attention with "look, something is happening here". The LPR rituals are more a preparation for Greater Pentagram Rituals that allow you to charge/discharge talismans/amulets with elemental power, same as Greater Hexagram Rituals do with planetary energies (that being said, Lesser Hexagram Rituals are a preparation for Greater Hexagram Rituals).
To truly banish for protection you need to do the counterpart of the Middle Pillar Rite, you have to do the Rose Cross Ritual, which is hard as hell and I never managed to learn that ritual completely, so let me present here a simple IAO ritual used by Fraternitas Saturni:
1. Stand straight with your hands directed up.
2. Imagine an infinitely long vertical circle going through the axis of your body, color of this circle is white.
3. Vibrate "Ee"
4. Move your hands side ways to the cross position.
5. Visualize a red infinite circle going through your hands, vibrate "Ah"
6. Cross your arms on your chest and visualize yourself being in an infinitely big blue orb.
7. Vibrate "Oh".
Symbol based systems
There exist energy systems based on symbolism. This symbolism is needed in both understanding and using the system. For example in case of GD rituals, you need to know something about planets, elements, pentagrams, hexagrams, holy names. In case of Reiki you need to know symbols, healing positions and how to cup the hands correctly.
You can of course use your sigils or alphabet of desire to create your very own system, whether in conjunction with other systems or not. For example you can use elemental orbs and in your imagination draw desired sigils with them just like with a paintbrush. You can also use e.g. a white orb as an erase of the symbols drawn in such a manner.
The biggest advantage of the energy paradigm is that it's the fun. With energy work you train both your will AND your imagination, plus you can have a lot of fun with different energy work techniques. Whether you focus on visualization, breathing, body movement, eye movement, adjusting or dispersing different energies, or you go full Bardon to draw Fire into your head, Air into your lungs and heart, Water into your belly and Earth into your legs to go full tetrapolar is strictly on you and your responsibility. Achieving the equillibrium of elements this way isn't as significant or stable as with introspection and strict lifestyle, but it is more fun.
There are different advantages and disadvantages for every and each paradigm. Use what suits you the best and remember: "Nothing is true, everything is permitted".