There might be a fanfiction where Arataka Reigen somehow gets involved in the Akatsuki's plans. Since he is so good at bluffing, he could try to infiltrate the Akatsuki and end up in all sorts of crazy situations. Or perhaps a story where he helps Naruto train his Rasengan in a really strange way, like using his psychic - like skills (even though they are mostly fake in his original series) to enhance Naruto's chakra control.
To write an 'arataka reigen naruto fanfiction', start by doing research on both series. Know the rules of the Naruto world, like chakra and jutsu. For Reigen, understand his way of talking and his motives. You could start with a simple idea, like Reigen being hired to help a ninja village with a'spiritual' problem. As you write, let the characters develop. Maybe Reigen will learn some real skills from the Naruto characters, or vice versa. Also, use vivid descriptions to bring the Naruto world to life in your story, whether it's the Hidden Leaf Village or a battle scene.
Reigen survives throughout the manga. The story doesn't involve his death. The plot focuses on his adventures and interactions without that tragic event.
Makima's fate in the manga is quite complex and involves a series of dramatic events. She faces powerful opponents and has her own agenda that leads to significant developments.
Reigen does have powers in the manga, but they are often presented in a more subtle and unique way. His abilities might not be straightforward combat skills but could involve manipulation or perception.
In the manga, Reigen doesn't have powers. His charm and appeal come from his down-to-earth nature and the way he navigates the supernatural world without relying on extraordinary abilities.