[Maursault]

> Pure utter terrifying demonic nightmares and hallucinations to the point where at its worst I was too afraid to even try and sleep.

If you are still suffering from nightmares, lucid dreaming[1] can be practiced and learned. I doubt mastering lucid dreaming is easy, but even without nightmares, it is its own incentive.

[1] https://en.wikipedia.org/wiki/Lucid_dream#Suggested_applicat...