It's hard to say for sure. Luffy has grown a lot in strength, but Rob Lucci is also a tough opponent. It could go either way depending on their strategies and determination.
Yes. The conflicts between Sanji and Luffy in the manga often stem from complex circumstances and character developments that drive the narrative forward.
I'm not entirely sure specifically what the 'yfn lucci true story' is. It could be about his life journey in the music industry, his rise to fame, or his personal experiences that have shaped him as an artist.
One common theme is redemption. Many fanfictions try to show Lucci in a different light, giving him a chance to atone for his past actions. Another theme is friendship. The original characters often form unique friendships with Lucci, which changes his perspective. For example, in some stories, the oc helps Lucci see the value in things other than power.
Sure. One great rob lucci oc fanfiction is 'The Redemption of Lucci' which gives a new take on his character. It shows him in a more complex light, dealing with his past actions and trying to find a new path. Another interesting one is 'Lucci's Hidden Ally' where an original character befriends Lucci and they go on various adventures together.
Naruto's Rasengan could be combined with Rob Lucci's Rokushiki techniques in an interesting way. For example, Naruto could infuse his Rasengan with Lucci's Rokuogan, creating a super - powerful attack. This would require them to first learn to trust each other and share their abilities.