squad goals tournament balanced algorithm https://codesandbox.io/s/tournament-algorithm-gpmy7c?file=/index.js

algorithm.js

const players = [
  {
    nickname: "shinykip82",
    displayName: "𝓢𝓱𝓲𝓷𝔂𝓚𝓲𝓹82",
    crowns: 545
  },
  {
    nickname: "alan_snowman",
    displayName: "alan snowman",
    crowns: 6593
  },
  {
    nickname: "marlenii",
    displayName: "M-Lenii",
    crowns: 3193
  },
  {
    nickname: "golden_socks",
    displayName: "Golden_Socks",
    crowns: 495
  },
  {
    nickname: "PandaPotter1",
    displayName: "PandaPotter1",
    crowns: 4814
  },
  {
    nickname: "janarca",
    displayName: "Janarca",
    crowns: 5653
  },
  {
    nickname: "galaxystar4041",
    displayName: "GalaxyStar | Tim",
    crowns: 929
  },
  {
    nickname: "boorrna",
    displayName: "LAOS MOST WANTED",
    crowns: 4694
  },
  {
    nickname: "majestik_ex",
    displayName: "Majestik",
    crowns: 2636
  },
  {
    nickname: "neonnd12",
    displayName: "neonnd12",
    crowns: 759
  },
  {
    nickname: "archsine",
    displayName: "Archsine",
    crowns: 1427
  },
  {
    nickname: "violetti_lohis",
    displayName: "violetti_lohis",
    crowns: 953
  },
  {
    nickname: "— 𓏲࣪ ٬٬ 🌑 𝓑𝒍𝒖𝒆 𝓜𝒐𝒐𝒏. Ⳋⳋ",
    displayName: "Gilbert_Hime / Unique Fraise 🍓",
    crowns: 1565
  },
  {
    nickname: "auron956",
    displayName: "Auron956",
    crowns: 3327
  },
  {
    nickname: "ein_vampi",
    displayName: "Vamp",
    crowns: 3868
  },
  {
    nickname: "squirrelburrito",
    displayName: "squirrelburrito",
    crowns: 1916
  },
  {
    nickname: "nohtos",
    displayName: "nohtos",
    crowns: 1771
  },
  {
    nickname: "harpielad",
    displayName: "RenaVenga",
    crowns: 2946
  },
  {
    nickname: "buntafujiwara82_longcoyote82",
    displayName: "Long Coyote 82",
    crowns: 2294
  },
  {
    nickname: "thempxst",
    displayName: "thempxst",
    crowns: 3800
  },
  {
    nickname: "Kons08",
    displayName: "Kons08",
    crowns: 1305
  },
  {
    nickname: "icyy",
    displayName: "icyy",
    crowns: 1725
  },
  {
    nickname: "wassuh_my_ninja",
    displayName: "Wassuh_My_Ninja",
    crowns: 2805
  },
  {
    nickname: "basosysg",
    displayName: "BasosySG",
    crowns: 4727
  },
  {
    nickname: "NappyEater",
    displayName: "Full Nappy",
    crowns: 6197
  },
  {
    nickname: "g.i.janie",
    displayName: "G.i.Janie",
    crowns: 249
  },
  {
    nickname: "delunali",
    displayName: "mimi (electricallz)",
    crowns: 1835
  },
  {
    nickname: "duxonline",
    displayName: "DuxOnline",
    crowns: 1015
  },
  {
    nickname: "gripofdogs",
    displayName: "gripofdogs",
    crowns: 1470
  },
  {
    nickname: "katdog88",
    displayName: "Ƙ@tƊ□g⁸⁸",
    crowns: 1955
  },
  {
    nickname: "slickback93",
    displayName: "Slickback93",
    crowns: 2041
  },
  {
    nickname: "carookemachine",
    displayName: "Carookemachine",
    crowns: 2682
  },
  {
    nickname: "vlado35bg",
    displayName: "vlado35bg",
    crowns: 2244
  },
  {
    nickname: "netmania",
    displayName: "Net (is Fall Guy)",
    crowns: 2252
  },
  {
    nickname: "nickallegri",
    displayName: "NickAllegri",
    crowns: 2900
  },
  {
    nickname: "ghostofmidville",
    displayName: "GhostofMidville",
    crowns: 2792
  },
  {
    nickname: "lilacausten",
    displayName: "Lilac",
    crowns: 803
  },
  {
    nickname: "otto_helmut",
    displayName: "OttoHelmut",
    crowns: 1275
  },
  {
    nickname: "mfpdeux",
    displayName: "mfpdeux",
    crowns: 1589
  },
  {
    nickname: "HusseinAhmed",
    displayName: "HusseinAhmed",
    crowns: 3100
  },
  {
    nickname: "splashyheron",
    displayName: "SplashyHeron",
    crowns: 5101
  },
  {
    nickname: "mandy",
    displayName: "MegastonexMandy",
    crowns: 2058
  },
  {
    nickname: "savarez03",
    displayName: "air_bobby_",
    crowns: 3058
  },
  {
    nickname: "wassey.",
    displayName: "wassey.",
    crowns: 2844
  },
  {
    nickname: "g.g.guy",
    displayName: "G-G-Guy",
    crowns: 3569
  },
  {
    nickname: "nightmareofthelabyrinth",
    displayName: "Emelie",
    crowns: 1394
  },
  {
    nickname: "ameentey",
    displayName: "Ameentey",
    crowns: 198
  },
  {
    nickname: "helbiggetje",
    displayName: "Helbiggetje",
    crowns: 3635
  },
  {
    nickname: "saftniki",
    displayName: "Saft Niki",
    crowns: 4682
  },
  {
    nickname: "perspectivus",
    displayName: "perspectivus",
    crowns: 3897
  },
  {
    nickname: "pierrotcsr2",
    displayName: "Pierrot WestCoast514",
    crowns: 2642
  },
  {
    nickname: "jagaroot",
    displayName: "Jagaroot",
    crowns: 3064
  },
  {
    nickname: "ambs_92",
    displayName: "ambs",
    crowns: 2311
  },
  {
    nickname: "hotarumalfoy",
    displayName: "HotaruMalfoy",
    crowns: 3712
  },
  {
    nickname: "wheelindealing",
    displayName: "WheelinDealing",
    crowns: 1883
  },
  {
    nickname: "trojangirl",
    displayName: "TrojanGirl20",
    crowns: 2611
  }
].map((player, index) => ({ ...player, applicationId: index + 1 }));

const sum = (arr) => arr.reduce((acc, val) => acc + val, 0);

const getUniqueListBy = (arr, key) => [
  ...new Map(arr.map((item) => [item[key], item])).values()
];

function createBalancedTeams({ players, teamsCount, minPlayersPerTeam }) {
  const sortedPlayers = players.sort((a, b) => b.crowns - a.crowns);
  const teams = Array.from({ length: teamsCount }, () => []);

  for (let i = 0; i < sortedPlayers.length; i++) {
    const player = sortedPlayers[i];

    let minCrownCount = sum(teams[0].map((player) => player.crowns));
    let minCrownCountTeamIndex = 0;

    for (let j = 1; j < teamsCount; j++) {
      const currentCrownCount = sum(teams[j].map((player) => player.crowns));
      if (currentCrownCount < minCrownCount) {
        minCrownCount = currentCrownCount;
        minCrownCountTeamIndex = j;
      }
    }

    teams[minCrownCountTeamIndex].push(player);
  }

  for (const team of teams) {
    while (team.length < minPlayersPerTeam && sortedPlayers.length > 0) {
      team.push(sortedPlayers.pop());
    }
  }

  return teams.map((team, index) => ({
    team,
    name: `Team ${index + 1}`,
    crownsTotal: sum(team.map((player) => player.crowns))
  }));
}

const result = createBalancedTeams({
  players: [...players],
  teamsCount: 8,
  minPlayersPerTeam: 6
});

console.log("Length:", players.length);
console.log("Players:", getUniqueListBy(players, "nickname"));
console.log(result);