Luffy's victory over Doflamingo in the manga was a combination of factors. His growth in strength, his unwavering will, and his ability to adapt to Doflamingo's tactics all played a role. Additionally, the support of his friends was crucial in tipping the scales in his favor.
I'm not really into this kind of fanfiction much. But generally, in such fanfictions, the relationship between Doflamingo and Law might be explored in a very different way from the original story. Maybe it focuses on their power dynamics and how they interact with each other in a more personal or emotional level.
Once Luffy is kidnapped, Doflamingo might try to break Luffy's spirit. But Luffy being Luffy, he would resist. Meanwhile, the crew's journey to rescue him could be filled with many obstacles. They might encounter other pirates or marines who are either allies or enemies of Doflamingo. The crew would have to fight their way through and use their combined skills to reach Luffy. For example, Brook could use his soul powers to pass through walls and scout ahead.
Well, in this scenario, Luffy's crew would surely go all out to rescue him. Nami might come up with a clever plan using her navigation skills and knowledge of the area where Doflamingo is likely to be hiding Luffy. Zoro would be ready for a fight, his swords sharp and his determination unwavering. They might also get some unexpected help from other characters in the One Piece world who have a grudge against Doflamingo.
Power dynamics is a very common theme. Given that both Law and Doflamingo are powerful characters in their own right, fanfictions often explore how they interact in terms of power. For example, who has the upper hand in different situations.
Power dynamics is a common theme. Doflamingo is a very powerful and manipulative character, and Law has his own set of skills and goals. Their interactions often involve a struggle for power or influence over situations or other characters.
Nami could be a main character. She would be very worried about Luffy and try to find him. She might use her navigation skills to track down Law's ship. And she could be the one to try and negotiate with Law for Luffy's release.
One common theme could be power struggle. Doflamingo is a very powerful character and Law also has his own strength. In fanfiction, this power play between them can be a central theme. Another could be the idea of redemption or corruption. Depending on how the story is written, one character might influence the other in terms of moral standing.
Yes, there are quite a few on Fanfiction.net as well. You can search for 'Doflamingo x Law' and you'll get a list of fics. However, the quality can vary greatly. Some might be more action - oriented, showing them in battles together or against each other, while others might explore a more romantic or platonic relationship between the two characters.