It would be good something for extreme insomnia.
The current fast sleeping audios are good but not so good for extreme insomnia (at least in my case)
I have an idea based on a pill in my country:
-Melatonine
-Valeriana officinalis (A plant very good for sleeping Passion Flower: Benefits, Side Effects, Dosage, Interactions)
-Passiflora (Another plant Passion Flower: Benefits, Side Effects, Dosage, Interactions)
-Linden (A herb popularly used as a tea but in this case has to be used naturally)
You could add them negentropy and maybe even the real flavors of those plants/herbs.
Furthmore, it could be other benefits such as pain relief, stress relief and digestive improvements.