Regressor? fine Stuck in same time / day / month / year till free? good Send to novel / game world ? nice To stone age with Modern world knowledge (genius inventor lol)? Nope As bonus please MC with good head to use that information.
This, I really should start and read it. I've been holding off on reading it for years now. Academy Undercover Professor is also a good one, Villain Wants to Live, Love Letter From The Future, and I think Second-Life Ranker(though he doesn't have future knowledge).
The Novel's Extra. The guy is in the novel he was writing, except the being who sent him there made some changes. Reverend Insanity. Cultivation novel where the guy used a power to go back in time to when he first started learning to cultivate. Re: Evolution Online. A VR videogame is actually a "tutorial" for powers and monsters coming to earth. The guy dies and goes back in time to when the game first came out.
Maybe something like: Tsuyokute New Saga Shi ni Modori, Subete wo Sukuu Tame ni Saikyou He to Itaru Volcanic Age Tales of Demons and Gods