The Hyper State Sleep.
Helps activate gene for people who only need 3 hours of sleep making him need way less sleep and feel a lot more energized.
The Orgone Accumulator
This one give immediate boost to energy.
Plasma Charged Mitochondria
Jing Infusion
Jing will increase his life force, and vital energy, extremely crucial.
Adrenal and kidney from sapiens.
Kidney and Adrenal Healing
Healthy and Balanced Adrenaline
This one might really help him however its from PU a trusted creator, that sapiens approved and others have found his work to be powerful too.
For the physical body you can do AMPK: The Energy Enzyme, its on patron will work wonders for energy too.
Now this one will cost money but it will in my opinion be extremely essential as sometimes fatigue, comes from energetic reasons that we are unaware of.
Aura and Energy Body Repair.
It repairs any leakage of energy in the aura and energy body that may be draining your energy, this one can really be transformative.
Also lastly you might want to tell him about the practice of semen retention its the most powerful practice you can do for energy conservation, and will create a mass amount of energy sometimes most problems lie from creating leakage of energy, you can listen to all audios in the world but if you have a loose your energy daily, his/her system will stay weakened. I doubt his problem has to to do with this, because it sounds a lot more like a physical problem, however this can help him in the long run and have the available energy to heal.
Soul restoration can also help with this.