So previously this story was supposed to be different, but now it's a mix of dragon ball and one piece
Regarding power scaling, our mc would be the strongest as an individual character comparing to one piece world not dragon ball the only concept i will take from dragon ball is the concept of dragon balls and pure martial arts part as well as the ultimate peak of it ultra instinct it will nerfed though..
Give the story a try and give your feed back
Try to guess in the comment section about what i will cook with the dragon ball part though it is somewhat obvious what it could be..