There are fanfictions where Naruto having the Six Paths power changes the entire power dynamic in the ninja world. In some, he becomes a sort of unifying figure. Since he has such great power, he uses it to bring all the ninja villages together in peace. He might share the knowledge of the Six Paths power with other ninjas, so they can all become stronger and protect their villages better.
Some 'Naruto has Six Paths' fanfictions focus on his relationships. With this new power, Naruto's friends might view him differently. Sasuke could be either jealous or in awe. Sakura might be more protective. And Naruto himself has to deal with the burden of this great power while still maintaining his relationships. It could be a story about how he balances his newfound strength with his personal life.
One interesting fanfiction could be where Naruto fully masters the powers of the Six Paths of Pain much earlier than in the original story. This could lead to him quickly overpowering his enemies and changing the course of the ninja world. He might use the abilities in unique ways, like combining the Deva Path's gravity control with his own shadow clone jutsu for some really cool battle strategies.
One interesting 'Naruto is Sage of Six Paths' fanfiction could be where Naruto uses his new powers in unexpected ways. For example, he might be able to travel through different dimensions more easily. Another could be a story where he has to teach the next generation about the power of the Sage of Six Paths.
A fanfiction called 'The Legacy of the Six Paths in Naruto' is also quite good. It's a long - form story that not only focuses on Naruto's journey with the Six Paths powers but also on how it affects the entire shinobi world. It has complex storylines involving different villages and their reactions to Naruto's growth in this aspect. There are also some really emotional moments that add depth to the story.
Another idea is that the Six Paths power in fanfiction could have unforeseen side effects on Naruto. He could start to have visions of the past Sage of Six Paths' life in more detail, and these visions could either guide him or mislead him. This would add a new layer of mystery and internal conflict to Naruto's character as he tries to figure out what these visions mean and how to use the power without being consumed by it.
You can try Archive of Our Own (AO3). It has a large collection of Naruto fanfictions, and there are likely many that focus on Naruto having the Six Paths power. The tagging system there makes it relatively easy to search for what you want.
One interesting plot could be exploring how Naruto's new powers from the Six Paths change his relationships. For example, how does he interact with Sasuke now that he has such god - like abilities? Maybe he becomes more of a mentor figure to the younger generation in the village.
One interesting concept could be the unique ways a character might combine different Six Paths powers. For example, using the power of the Deva Path for offensive and defensive abilities while also integrating the power of the Asura Path to enhance physical strength. Another concept could be exploring how the Six Paths powers interact with a character's existing abilities or jutsu. It might create new and unexpected combinations that change the course of battles in the fanfic.
Perhaps a plotline where Naruto uses his new status to bring about true peace in the ninja world. He could start by uniting all the hidden villages in a more profound way than ever before, sharing the secrets of the Sage of Six Paths to promote harmony and understanding among different ninja clans. This would involve complex diplomatic efforts and also dealing with those who oppose this radical change.
Another plotline could be centered around Naruto's relationships. His friends and allies might react differently to his new status. Some might be in awe, while others might be a bit jealous or worried. This could create some interesting dynamics and conflicts within the story.
Obviously, Naruto is the main character since it's about him being the Sage of Six Paths. But other characters like Sasuke are often important too. Sasuke might be Naruto's ally or sometimes a rival even with Naruto's new status.