In the latest chapter he used black haki on his swords and his strongest attack power wise
sanzen sekai is three thousand worlds and its the most secret technique of three sword style and he first tried to use it to bring down mihawk and then Oz. Its an attack that he used in the most dire situations and against the most hopelessly outrageously strong opponents.
I am not saying that thats his max speed or his max endurance but I believe we just saw zoro use his maximum attack power (Before Asura ofc this thread is that this is zoro in base's strongest attacking power)
sanzen sekai is three thousand worlds and its the most secret technique of three sword style and he first tried to use it to bring down mihawk and then Oz. Its an attack that he used in the most dire situations and against the most hopelessly outrageously strong opponents.
I am not saying that thats his max speed or his max endurance but I believe we just saw zoro use his maximum attack power (Before Asura ofc this thread is that this is zoro in base's strongest attacking power)