Alongside the prominent compositions in season 9 are notable 3-gold duos like Vel'Koz and Sona or Akshan and Rek'Sai, Darius and Katarina also present an incredibly strong synergy. This is one of the reroll compositions that gamers can utilize to climb ranks in the current meta of Teamfight Tactics season 9.
If you're a chess enthusiast who enjoys the reroll playstyle, then join Mytour in the article below to explore how to construct and deploy the power of the Darius and Katarina carry composition.

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Team Composition
Katarina is an assassin chess piece with significant area-of-effect damage in TFT 9, but she lacks the ability to finish off targets, which is where Darius's strength lies, needing a 'one-shot' to continuously activate Noxus Guillotine. The completed composition for Darius and Katarina carry at level 8 will include champions such as Cassiopeia, Swain, Kled, Katarina, Darius, Azir, Nasus, and Sion.

Equipment
While we know we need to optimize equipment for both carries, in most cases, only one champion can receive the most complete set. According to Mytour, the priority here should be Darius, with Giant Slayer, Bloodthirster, and Infinity Edge. As for Katarina, the best 3-piece set for the assassin would be Guardian Angel, Hand of Justice, and Runaan's Hurricane.

Sion would be the ideal choice for players to equip defensive items, but until obtaining Immortal Vanguard, Nasus still plays the tank role. Thornmail, Redemption, Dragon's Claw, or Thornmail,... are defensive items that you should prioritize combining first.
Gameplay
Lee Sin undoubtedly stands as the best Legend to build the gameplay of the Darius and Katarina carry composition, as it greatly supports bringing both carries to 3-star early on. Additionally, Bard is also a good choice with supplementary component packages for players and helps them acquire preferred items. If you're confident in your skills, you can use Orn according to the current meta and cleverly utilize randomly forged items.

By reaching level 5 straight after the first 2 PvP rounds and adding champions like Cassiopeia, Renekton, Swain, Kled, and Taliyah, players will activate the 3 Shurima and 3 Noxus synergies. Optimizing equipment from the early rounds will help you secure a long winning streak and increase the strength of your composition thanks to the Noxus trait's Punishment inherent ability.

With the legendary Lee Sin, bringing champions in the composition to 2 stars early on isn't too difficult, so players should focus on accumulating gold to reach level 8 as soon as possible, ideally right after the third carousel round. Once at level 8, we'll roll to complete the composition and upgrade both carries to 3 stars. In case level 9 is achievable, consider adding Jarvan IV for a bit of crowd control and hitting the 3 Vanguard threshold.

Conclusion
Overall, Darius and Katarina carry is a fairly challenging composition, requiring a winning streak from early on and maximizing the activation of Noxus tribe's inherent traits. If on an unlucky day, you fail to upgrade any carries to 3 stars, then dropping out of the top will be inevitable. The above is a reference article on how to build and deploy the Darius and Katarina carry composition, hoping it will be beneficial for chess players in their journey to conquer their desired ranks.