So this one’s pretty simple! The Asker just wanted to see Toi in a crossover pairing, and I can’t think of any reason why not. I also know there’s a bit of a demand to see Vegeta topping more characters, plus there’s a nice parallel here to an older Ask with Goku and Kazuki. If Kazuki is analogous to Goku, then Toi would have to be the Vegeta, I’d think.