For humans (Z-Fighters) to be able to scale to Base Goku as of BoG, what needs to happen is something along these lines;
1. Intense Training, with a God/Angel, for 1,000 years or something like that. Like, Whis or Vados or whoever would have to be able to manipulate their lifespans and grant them longevity— as well as do some crazy shit like the Filler before the fight with the Saiyans— where characters had been warped to different times and fighting really strong beings throughout history in life or death matches. Basically, Whis has to constantly almost kill them every day, for the next few centuries.
That would satisfy me if they became Base Goku Level.
Ultra Instinct Omen? Same thing, but a million years or something, no rest, nothing. Just straight grinding.
As a bonus, i'll go over how I feel the Tournament of Power fodder could've earned star level or universal strength, since the story currently acts as if Namek Saga Frieza was weak and his power level is common, when that's not likely.
For those random aliens to be Universal; they would have to have trained with Angels their entire lives— and still have great potential to back up their worthiness of training.
Star level? Training with Kaioshin instead of angels for all their lives.
Caulifla, Cabba, and Kale, should have already been Super Saiyan, if they were supposed to just be universal in their bases. To say that they can be that strong without going over any hardship that would basically push them to being Super Saiyans by necessity— it basically makes U7 out to be ants in comparison to every other universe.
I understand that the people that were chosen were the best in their universe— but I need a statement or something that says that U7 has the lowest potential for strength as well, if everyone in their mother can just be Universal by accident.
