One great 'Aomine x Kise x Kagami' fanfiction could be 'The Bond Beyond Rivals'. It delves into how their competitive natures on the court gradually transform into a deeper connection off the court. They start to understand each other's insecurities and dreams, and the story beautifully weaves their individual growth with their evolving relationship.
There's also 'Triple Threat'. In this fanfiction, a special training camp forces Aomine, Kise, and Kagami to work together more closely than ever. Their interactions are filled with banter, but also a growing sense of respect. The story is exciting as it shows them facing tough opponents as a team while also dealing with their own personal feelings for one another.
Another interesting one is 'Unlikely Allies'. Here, an unexpected event outside of basketball makes Aomine, Kise, and Kagami realize that they have more in common than they thought. It explores their different personalities - Aomine's laid - back yet intense style, Kise's flamboyant and adaptable nature, and Kagami's fiery determination - and how these traits interact in unique ways as they form a special bond.