OmniSpectra
He already has infinte senzu beans so, I guess it's to grow the Tree of Might for the fruits and Food I guess?
Okay, a good wish right now would be for him to be even more tied with the Black Star Dragon Balls. In the way of, as he grows stronger, they react like they were created at his current strength; basically strengthening them as if he created them, with his new and improved strength. Or, the easier to understand version, have them be tied to you in such a way; that as you grow stronger, so they. And eventually, when you're strong enough, they gain the features that you initially intended for them to have; and even beyond, if you get even stronger.