I highly recommend 'Partners in Crime'. In this fanfic, Harley and Ivy team up to take on some new villains in Gotham. It's full of action and at the same time, shows their relationship evolving. Another one is 'Under the Stars'. It has a more romantic tone as they go on a camping trip together, away from the city lights, and discover new aspects of their relationship while enjoying the beauty of nature.
Character development is key. Harley's journey from being Joker's sidekick to finding her own identity with Ivy by her side. And Ivy's growth as a character, her connection to nature and how that affects her relationship with Harley. Also, a unique plot. Maybe something like they go on a quest to save a part of Gotham's nature that's being destroyed, which ties in with Ivy's character. It should also have good dialogue that reflects their personalities, like Harley's crazy but endearing one - liners and Ivy's more serious, nature - centric statements.
One possible scenario in this fanfiction could be Naruto finding himself in the chaotic world of Harley Quinn and Poison Ivy. Maybe Naruto's ninja skills would be put to the test against the various villains in their world. He could use his shadow clone jutsu to confuse enemies like the Joker or other foes that Harley and Ivy often face.
One way to find the best authors is to look at the reviews and ratings of the fanfictions. Authors who consistently get high ratings and positive reviews are likely to be good at what they do. Also, some fanfiction platforms have recommended authors or popular stories sections. Checking those out can lead you to some great Harley Quinn and Ivy fanfiction authors.
One popular Harley Quinn and Ivy fanfiction story could be about their adventures in Gotham City after teaming up to take on a new villain. They use their unique skills and their deep bond to outwit the bad guy.
It depends on your taste. If you're a fan of Harley Quinn and enjoy solo character-driven stories, then it's likely worth it. The comic might offer unique perspectives and adventures.
One popular storyline is their adventures in Gotham City together. They might be causing chaos against the villains who oppose them or even teaming up to outwit Batman. Another could be their relationship development, like how they support each other through tough times. For example, in some fanfictions, Poison Ivy uses her plant powers to protect Harley Quinn when she gets in over her head in a fight with some of the Joker's goons.