The worst writer on this platform is going to take a week-long break. Honestly, I don't have any real reason to take this break, but I want to spend some more time thinking about what to do with this first wish.
I don't write scripts, nor do I think much before writing the chapters, mainly because I already have the original to base myself on, but I feel that this wish needs to be well thought out, but before you propose very advantageous wishes, which would help Seth become strong even easier than he already is, know that I prefer to throw the wish away than to do that.
Seth being a mix of Saiyan and Viltrumite already breaks the story a lot, it's hard for me to imagine him having problems becoming stronger than everyone else.
I have some ideas for a wish, for example the location of all living Saiyans, this will happen at some point in the future, I just don't know if now is the right time, I would prefer to do it when Seth is ready to leave.
Another wish, more romantic in a way, would be to ask that everyone he loves age as slowly as he does, to ensure that he doesn't simply watch everyone around him grow old and die. This could also be done in the future, or it might not even happen in the novel.
If you want to give me your ideas, I can choose one, just don't say something overpowering.
And to end this warning, I have a question that I hope you will answer. Seth's power levels will always be available to him, and if you want to know, you can ask me and I will tell you, in the future when traveling through the universe, scouters will be recurring, so at least up to 1,000,000 PL will still be shown.
Here's my question, should I try to stick to the "official" power levels, like Frieza having 120 million and SSJ Goku having 150 million? Or should I just go by what's said in the manga and use my own interpretation?
The truth is that this will have little use in my story, since most of the time the only power revealed will be Seth's, so it won't be that useful to compare before the fight, only after it would there be a way to imagine the opponent's power.
And about the transformations, I have a slightly different idea than most sources, when they happen I will explain through Seth.