Well, in the manga, Yuji has a lot of growth and potential. However, Mahito is no pushover. His cursed spirit nature and devious tactics make him a force to be reckoned with. So, it's hard to say for sure who's stronger.
Todo's appearances in the JJK manga are scattered. It depends on the specific storylines and conflicts. Sometimes he's in the foreground, and other times he makes cameos to add to the overall narrative.
A good Spiderman vs Batman reaction fanfiction should have well - developed characters. It should stay true to the essence of both characters. For example, Spiderman's quippy nature and Batman's brooding seriousness. The plot should be engaging, not just a simple fight. Maybe there could be a misunderstanding that leads to the conflict. And the setting can add a lot to the story too. If it's set in a shared universe where both heroes have to deal with new threats while also facing each other, that could be really interesting.
I think Spiderman would have an edge in a fight against Batman. His powers are more innate. He can swing from building to building effortlessly and has a much stronger physical strength compared to Batman. Batman is just a human, albeit a very well - trained one. In the fanfiction world, though, the story could be twisted to make Batman's gadgets and strategic mind overpower Spiderman. But overall, Spiderman's natural abilities give him an upper hand.