I was liking this story but it seems it doesn't really do anything with the Mc all the other characters get more screen time than the Mc like the Mc barley shows up to me. also when you had rias do goku's signature move I had to let go. I'm sorry my friend
you should definately do this again but make it so he started 1000s of years later with the start and he builds and learns all that magic and makes the samctuaries becomes the strongest wives etc