AllBullshit
magi, out of those worlds in my opinion most benefits are there. He could get a good metal vessel and in my opinion the girls in it aren't bad magic could be very useful short and longterm through his journey. sure the difficulty is high but so is the benefits and if he ends up having his own dimension like asora from tsukimichi he could have his own dimension and kingdom if that's what your going for. food for thought.