this thing that u keep using to justify hashi's power as a myth to show how strong he was thats just lame hiruzen was taught by the 1st hashi and the 2nd so y wouldnt he be stronger then them both in his prime years as it has been stated by kakashi that the next generation will always surpass the previous generation so i believe hiruzen was stronger then hashi at some point and the main reason hashi's power was referd to as a myth is because the guy could create a forest from his wood element by turning chakra into life energy and being able to supress the bijuus chakra is amazing so obviously if i told u of such a person u would think its a myth