Arena Tier

function solve(arr) {
  let gladiators = {};

  for (let info of arr) {
    if (!info.includes('vs') && info !== 'Ave Cesar') {
      let tokens = info.split(' -> ');
      const gladiator = tokens[0];
      const skill = tokens[1];
      const skillPower = Number(tokens[2]);
      if (!(gladiator in gladiators)) { gladiators[gladiator] = {}; }
      if (!(skill in gladiators[gladiator])) { gladiators[gladiator][skill] = skillPower }
      if (gladiators[gladiator][skill] < skillPower) { gladiators[gladiator][skill] = skillPower }
    } else if (info.includes('vs')) {
      const [gladiator1, gladiator2] = info.split(' vs ');
      const doesExist1 = Object.keys(gladiators).includes(gladiator1);
      const doesExist2 = Object.keys(gladiators).includes(gladiator2);
      if (doesExist1 && doesExist2) {
        for (const skill of Object.keys(gladiators[gladiator1])) {
          if (skill in gladiators[gladiator2]) {
            const firstGL = Object.values(gladiators[gladiator1]).reduce((a, b) => a + b);
            const secondGL = Object.values(gladiators[gladiator2]).reduce((a, b) => a + b);
            (firstGL > secondGL) ? delete gladiators[gladiator2] : delete gladiators[gladiator1]
          }
        }
      }
    }
  }

  gladiators = [...Object.entries(gladiators)]
  .sort((a, b) => Object.values(b[1]).reduce((a, b) => a + b) - Object.values(a[1]).reduce((a, b) => a + b) || a[0].localeCompare(b[0]))

  for (const gladiator of gladiators) {
    console.log(`${gladiator[0]}: ${Object.values(gladiator[1]).reduce((a, b) => a + b)} skill`);
    const skills = [...Object.entries(gladiator[1])].sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0]));
    skills.forEach(x => console.log(`- ${x[0]} <!> ${x[1]}`));
  }
}