Naruto's chakra - based powers and Fem Gilgamesh's magic would be an interesting combination. Naruto could use his Rasengan, a powerful chakra - based attack, while Fem Gilgamesh could enhance it with her magic, making it even more destructive. Or she could use her magic to create barriers to protect Naruto while he charges up for a big attack.
The plot might involve Naruto being summoned to the Fate Stay Night world by accident. There, he catches the attention of Fem Gilgamesh. She could be intrigued by his unique chakra and his ability to keep getting back up no matter how many times he is knocked down. They might then embark on a journey to find a way to send Naruto back home. Along the way, they face various challenges and enemies. Naruto could teach Fem Gilgamesh about the value of friendship and hard work, which are concepts not as emphasized in her world, while she could introduce Naruto to the complex magic and power hierarchies of the Fate world.
Naruto's chakra - based powers and Alucard's vampiric powers could have some interesting interactions. For example, Naruto's Rasengan, which is a concentrated form of chakra, might be able to disrupt Alucard's regeneration if it hits her directly. On the other hand, Alucard's superhuman strength and speed could give her an edge in close - combat against Naruto. She could dodge his attacks more easily and counter with her own powerful strikes.
Their powers could interact in a really interesting way. Naruto as Noble Six might have some unique combat techniques that could be enhanced by the Fem Kyuubi's chakra. For example, if Noble Six has some sort of speed - based ability, the Kyuubi's chakra could boost it even further.
In a crossover, the power systems would likely have to be balanced. The jutsu in Naruto are very different from the magic in Fate Stay Night. However, if a Fate character were to enter the Naruto world, they might find that their magic is affected by the chakra - rich environment. For instance, a mage's fire spell might be enhanced by the natural energy in the Naruto world. On the other hand, a ninja using chakra might find that they can learn some basic magic concepts from the Fate characters and use it to supplement their jutsu.
I really like 'Gilgamesh and Saber: An Alternate Path'. It takes a different route from the original story. Here, Gilgamesh realizes Saber's worth much earlier and tries to court her in his own haughty way. It's an interesting take on their relationship and how it could have developed.
Naruto's chakra - based powers and Killer Frost's ice powers could create some interesting combinations. For example, Naruto could use his Rasengan and combine it with Killer Frost's ice to create an ice - encased Rasengan that could be more powerful and have a freezing effect on opponents.
Supergirl's flight ability could be a great asset when combined with Naruto. She could carry him into the air, allowing him to use his long - range attacks from above. And when Naruto uses his Nine - Tails Chakra Mode, the sheer power might be on a par with Supergirl's strength in some ways. They could also exchange energy - like Naruto could transfer some of his chakra to Supergirl if she was weakened, and she could give him a boost of solar - based energy in return.
Naruto's chakra powers and Satele Shan's connection to the Force could potentially have some interesting interactions. Naruto's ability to mold and control chakra could be seen as a parallel to how Satele manipulates the Force. Maybe their powers could resonate with each other, creating a new and stronger energy field when they are in close proximity. For example, Naruto's Nine - Tails chakra could enhance Satele's lightsaber attacks, making them more powerful.
Fem Harry Potter's magic and Kakashi Hatake's ninja abilities could interact in some really cool ways. For example, Harry's invisibility cloak could be used in ninja stealth operations. It would give Kakashi an extra edge in sneaking up on enemies. Also, Kakashi's Sharingan could potentially analyze the flow of magic in Harry, which might help them both understand her magic better and find new ways to use it in combat.
If Naruto were in Fate Stay Night as a godlike being, he would likely change the power dynamics significantly. His vast chakra reserves and powerful jutsu could overpower many of the Servants. For example, his Rasengan might be able to break through even the strongest magical defenses. He could also use his shadow clone jutsu to outnumber his opponents in battle, which is a strategy not typically seen in the Fate Stay Night universe.