So imma go over all three abilities, feats, as well as explain why this team is almost impossible to beat and if y'all think otherwise than what three man team do you think can beat mines.
Eustass "Captain" Kid
Physical Abilities
Kid possesses immense physical strength and resilience. While being cuffed with Seastone, which depletes the energy of Devil Fruit users, he was able to match Luffy's speed in carrying and delivering large stone blocks bigger than him even with only one arm. He was also able to endure the torture of his imprisonment by the Beasts Pirates. More impressively, Kid has enough power to challenge and fight against two members of the Four Emperors on the roof of Onigashima, withstand multiple attacks from both Emperors, and even deal damage to both Emperors who were both known for their near invulnerable bodies. He was able to battle one of the Emperors head on, being able to withstand or even overpower direct attacks from the monstrously strong Big Mom, even after she had empowered herself further with her Devil Fruit abilities. Another impressive feat was the fact that he was able to clash with her even while unknowingly under the effects of Basil Hawkins' Devil Fruit abilities. Kid has an extraordinary recovery rate, as one of the prison guards said that his body could heal in a few days. Similar to Luffy, Kid has an incredible metabolism where he can eat large amounts of food, to the point where he becomes fat and round, but instantly burns all the calories to replenish his stamina.Kid is also an extremely skilled hand-to-hand combatant. While bound by Seastone cuffs and with only one arm, he managed to defeat Dobon, a Shinuchi of the Beast Pirates, alongside Luffy. Kid also managed to escape the Udon Prisoner Mine, while still cuffed in Seastone shackles.
Devil Fruit
Kid ate the Jiki Jiki no Mi, a Paramecia-type Devil Fruit that allows him to manipulate magnetic forces. He can attract and/or repel metal objects as he pleases, and he can also create magnetic fields that allow him to arrange metal objects into various configurations and constructs.
Kid can arrange the metal objects stuck to his body into a variety of shapes, with his most common technique being to form a gigantic metal arm to unleash powerful attacks with. In addition to covering his real arms with metal, Kid was also shown using his magnetism to form a rough replacement left arm after his cybernetic left arm had been removed by the Beasts Pirates.
This power makes Kid a very dangerous opponent against fighters who use metal weapons, since he can either repel metal projectiles, such as cannonballs and bullets, or attract his enemies' blades and guns towards himself to use as building material for his own attacks.
Awakening
Kid has achieved Devil Fruit Awakening, allowing him to bestow magnetic properties onto things other than his own body. By his own admission, he has not fully mastered his awakened powers and it takes a serious toll on his stamina.
Haki
Haoshoku Haki
Kenbunshoku Haki
Busoshoku Haki
Shiki the Golden Lion
Physical Abilities
Alongside Roger and Whitebeard, Shiki is one of the most powerful pirates of his generation and showed incredible physical might. He has tremendous physical strength supplemented with his supreme sword skills, allowing him to slay an army of Marines alone at Marineford. After capture, he was imprisoned in Level 6 of Impel Down and survived in prison despite his injuries from the previous battle. He has a massive level of endurance as he could survive having parts of a steering wheel permanently embedded deep into his head, a feat that impressed Indigo, and an immense tolerance to pain. After he amputated his own legs to break free of Seastone shackles, Shiki was completely unfazed by the pain, even casually smoking a cigar as he joked around with Hannyabal. Without any medical treatment and with profuse and heavy bleeding, he successfully broke out of the impenetrable security defenses of Impel Down single-handedly. Later, in a crude form of emergency treatment, Shiki forcefully grafted his swords into the inner stumps of his amputated legs. Despite shedding even more blood, Shiki simply shrugged it off. Even in old age, Shiki remained extremely powerful despite his strength having waned over time. He could block Sanji's kicks with one hand and negated Zoro's powerful slashes with his legs and sent him crashing to the ground with one crushing punch. He could fight on par with Luffy in his Gear 2 mode and withstand several attacks in turn. He also withstood Chopper's Kokutei Roseo Metel with almost no damage at all.
Tactical Skills
Shiki was also considerably crafty and resourceful as a pirate, able to remain hidden from the World Government for 20 years despite his famed status while putting his plan into action. Within his compound, Shiki had a communication network set across his chain of floating islands to monitor general surface activity and had established a base of operations within Merveille to accommodate his vast armada for decades. Shiki also had access to the SIQ formula developed by his crewmate Doctor Indigo, with an entire laboratory located on Merveille dedicated to its further research. Shiki was also shown to be a very charismatic and capable leader, managing to develop pirate armadas on at least two occasions in his career (the first was commented as being an exceptionally large fleet even in the New World; the Whitebeard Pirates division total is 1,600 pirates as a comparison, and the second looked to be nearly as large had Shiki not been stopped prematurely) Shiki ate the Fuwa Fuwa no Mi, a Paramecia-type Devil Fruit which allows him to fly, as well as make surrounding non-living matter levitate after he has come into contact with it.[2] Shiki states that once he makes something float, it will stay that way until either he himself undoes it or he loses consciousness. He has been shown to make several Marine vessels and even vast island areas float. However, his powers are unable to be used on any living matter other than himself, meaning he cannot levitate animals, plants, or other people. He can telekinetically manipulate any weapons, structures, and debris that he has previously made contact with, allowing him to attack his opponents with multiple flying weapons and large heavy objects, as well as form a shield to defend himself from attacks. Additionally, his ability to fly grants him a very high level of mobility. He can also use his power to freely manipulate his non-living surroundings, such as mineral, snow, and bodies of water. In addition to simply floating them, he can levitate them into intricate shapes, such as gigantic lion heads, which he can use to attack his opponents. His ability to levitate things can also be used to bind people in a vast amount non-living material, and even drown people by floating a large amount of water all around them.
Swordsmanship
Shiki possesses tremendous skills in swordsmanship as he dual-wielded Oto and Kogarashi to single-handedly massacre an entire army of Marines before getting subdued by Garp and Sengoku. After the two swords had become his prosthetic legs, not only did he have little difficulty in standing or walking while using them, but he is also capable of attacking from a distance with them by sending slashes from his sword legs in a Rankyaku-like fashion. These air-blades have a light-yellow/gold color-scheme, matching his epithet. He also combines his sword skills with his Fuwa Fuwa no Mi, such as slashing open a body of water and then levitating it to drown his opponents. He fended off all the slashes from Zoro's Nanajuni Pound Ho with great speed and reflexes, and later another attack from Zoro's was countered in mid-air and he knocked Zoro back down to the ground with great force. He was also able to fight on par against Roger, and later, it took both Garp and Sengoku in their prime to capture him alive.
Haki
It is said that he has haki but it's unknown if he had all three
Fujitora
Physical Abilities
Fujitora's physical strength and fortitude are immense, befitting an admiral. He was able to defend against and repel powerful attacks from the likes of Roronoa Zoro, Sabo, and Luffy as well as clash with them (including the latter when using Gear 2 and Gear 3) with little to no visible effort. He could also withstand a kick from Doflamingo without issue using his sword. Incredibly resilient, Fujitora could guard against a Haki-imbued Gear 3 punch from Luffy without using his own Haki while remaining unhurt by the blow. Fujitora has extraordinary reflexes and, coupled with his skill in Kenbunshoku Haki, can casually and precisely counter very swift and unexpected physical threats. For example, he perfectly timed his defense against an extremely fast-falling meteorite that he had summoned on his very location, deflecting a piece of it with casual ease, and calmly warded off an unexpected "flying slash" from Zoro. When Doflamingo surprise-attacked him with a kick, the admiral showed no concern whilst easily blocking it. The admiral's own movement speed is likewise impressive, as he could lunge forward to strike Luffy in their fight, being too quick for the pirate to react.
Swordsmanship
Fujitora possesses tremendous swordsmanship skills, which he combines with his Devil Fruit ability, channeling his gravity powers through his sword. Usually, Fujitora wields his weapon in a reverse-grip style, the blade pointing in the direction opposite to his thumb. Despite his blindness, the admiral has shown to be extremely skilled with his blade, able to deflect or block incoming attacks, even extremely strong ones or surprise attacks, with little issue using simple parrying maneuvers, demonstrating lightning-fast dexterity all the while. Fujitora's swordsmanship, combined with his Devil Fruit powers, allowed him to repeatedly and evenly clash with Sabo wielding his flame-shrouded staff and exhibit no trouble in doing so
Devil Fruit
Fujitora ate the Zushi Zushi no Mi, a Paramecia-type Devil Fruit that allows him to manipulate gravitational forces. The ability's range of effect can potentially span wide areas, even entire islands, and is primarily channeled through the admiral's sword. Fujitora can drastically increase the gravity around others, keeping them on the ground and making it difficult for them to move, including extremely strong adversaries. He can increase the gravity acting on opponents to press them down under immense pressure, even going as far as to create large craters deep into the ground. Fujitora can also control the direction of his gravity, allowing him to generate "horizontal" gravity to attack with a tremendous outward force. Moreover, the admiral is able to employ his power defensively by making fields of seemingly reverse gravity to repel attacks.[8] He can also use the gravity to pull objects directly toward himself, with the field of gravity being capable of reaching (possibly) into outer space, which Fujitora has used multiple times to summon meteorites to strike his opponents. By negating gravity entirely, Issho can enact the controlled levitation of nonliving objects around him. He has been shown levitating a battleship to move himself and his men more quickly over the sea, as well as floating a small rock to use as a personal mobile platform to stand and ride around on, achieving effective flight.
Haki
Kenbunshoku Haki
Busoshoku Haki
Now the reason why I think this team is almost impossible to beat is because they are all outstanding in there own right but together they basically have the advantage of any fight imo especially since their DF goes well together with Kid using his DF to create contraptions and different constructs as well as assign magnet poll to his opponent, Shiki being able to make the whole battlefield his playground, and fujitora DF allowing him to manipulate gravitational fields which can span far out as well as being able to increase gravity around his opponent making it hard for them to move (basically making them damn near stationary) and amongst other things he can summon meteorites.
So imo they are basically an all around team because they all can attack, defend, and support each other and I don't really see any weaknesses fr that could stop them or see any three man team being able to fight against them but I'm curious to see what three man team y'all can come up with.