Of course, even if he taught this to someone, those are things that one simply can’t copy.
Even if he forcibly taught those methods to other magicians, they would end up being in trouble instead.
As he doesn’t possess the normal amount of mana that most magicians have, they would run out of mana right away if they tried to follow his instructions.
As such, he continued to devote himself to his own studies until Luise, who at that time had a high amount of mana without being able to use it after studying at her home’s dojo in the magic combat style, and me, whose mana exceeded his own, appeared.