He could revive Minato. Minato was a very powerful ninja, and his return could help Naruto in terms of combat skills and strategic thinking. Also, Minato could pass on some unique jutsus or knowledge that he didn't have a chance to before.
Well, I remember a fanfic called 'Kushina in the Edo Tensei World'. It's a bit different. Instead of just focusing on her relationship with Naruto, it delves into how Kushina adjusts to being brought back by Edo Tensei. She has to come to terms with the new world she's in, all while trying to protect Naruto from threats that she discovers are still lurking in the shadows. It's really interesting as it gives a new perspective on the whole Edo Tensei concept in relation to Kushina.
Well, 'Swords of Edo Kinetic Novel' is likely a kinetic novel set in the Edo period. A kinetic novel usually focuses on a story with some visual and narrative elements. It might involve stories about samurais, the unique culture of Edo, like their social hierarchy, traditional arts, and the way of life back then. Maybe it has various characters, each with their own goals and stories, all intertwined within the Edo - themed backdrop.
Minato could be developed further by exploring his time as the Fourth Hokage more deeply. For example, show his political decisions and how they were influenced by the presence of the Kyuubi. Also, his relationship with other villages could be explored, especially in relation to the Kyuubi's power. Maybe he had to make some tough calls to protect the village from those who might want to use the Kyuubi for evil.
Well, it depends on the specific fanfic. Some fanfics might really emphasize Naruto's growth to be on par with Minato in terms of smarts. They could show Naruto learning from Minato's memories or having some sort of spiritual connection that transfers knowledge. However, other fanfics might focus more on other aspects of Naruto's character and not necessarily make him as smart as Minato.
I don't know the specific name of the Minato manga off the top of my head. It could be related to a particular genre or have some distinctive features that might help identify it.