Ovinomancer
No flips for you!
This doesn't really make much sense, though. What is this mystical training? When did you get it? These things are not required at all by 5e. I get that you'd probably make a houserule for it, but, again, houserules are kinda cheating when pointing out dissociated mechanics in the game.Some of those aren't nearly as dissociated as others as they can so easily be explained in the fiction:
1. Explained by extra training and study in being aware of one's surroundings.
Meat points that go away with a single 6 hours nap with 2 more hours of not having a combat for an hour? No, doing this breaks them even more because now that hit die makes no sense, the rest makes no sense, and the second wind makes no sense. You've solved one problem by make three others (at least) worse. And I don't think this solves the one problem, either -- what does 1 hp damage look like to a commoner vs a 20th level fighter if delivered from the same source? There's meat and then there's other meat?2. Dubious. Explainable if used on self as simply taking a breather, maybe.
3. Dissociated, as is the entire "hit dice" mechanic in 5e.
4. Dubious; the more one sees hit points as meat, the less dissociative they are. If they were split into body (meat) and fatigue (vitality) points the dissociation would lessen greatly. Where the dissicoation really rears its ugly head is at the 0 (down) and 1 (fully functional) point; an area that's needed help since the dark ages.
What specialized training, though? What makes a fighter making 4 attacks so uniquely different from a rogue making +10d6 attacks? What's the fictional element, here, that explains this every time instead of ad hoc each time?5. Explained by specialized training in faster/more efficient combat techniques.
A good sign of "dissociated" mechanics is going to be ad hoc explanations every time because this means there is no real in-fiction explanation that's happening, but rather a mechanic that requires flexing the in-fiction explanation to justify it uniquely every time.
Same as above.6. Explained by specialized training in stealthy combat techniques; training only available to the "right" people (a.k.a. Thieves and Rogues).