What if Rokushiki is Haki based?

If there was a fighter with no devil fruit or haki, but they (somehow) mastered every fighting style. How strong would they be? : r/OnePiece

Chapter Discussion - Rokushiki is based on Haki, Page 8

One Piece: Strongest Abilities That Are Not Devil Fruit Or Haki

ROKUSHIKI ACTUALLY HAKI POWER- Yaps, - Mugiwara Dangers

Rokushiki is based on physical strength is actually based on a mistranslation in earlier One Piece volumes : r/OnePiece

Chapter Discussion - Rokushiki is based on Haki, Page 5

Honestly Oda probably should have just expanded on Rokushiki instead of creating Haki. He could have definitely made it to where there are techniques that allow you to hit logias and armament

What is Conqueror's Haki? What would happen if Luffy had awakened it before his battle with Kaido? - Quora

Rokushiki is based on physical strength is actually based on a mistranslation in earlier One Piece volumes : r/OnePiece

What is Conqueror's Haki? What would happen if Luffy had awakened it before his battle with Kaido? - Quora