I don't think Magi would have done any better on Vita, nor should it have been on Vita. For starters, the first Magi game was on 3DS. Second, 3DS is an appropriate platform for shonen manga as a children's platform. The reason for low Magi sales can be at least partially attributed to children, with their extremely limited funds, buying Dragon Quest since that is what's popular with their peers. Also the first game wasn't very well received, so that would damage repeat sales. But there really is no comparison with games like Conception or Exstetra doing better on Vita.
If you want to talk about a game bombing due to being put on the wrong platform, Toushin Toshi comes to mind. I think it would have sold double on Vita. Major blunder by Imageepoch in terms of reading demographics.
