JSFiddle - React, Tailwind, and code Playground

JavaScript

const soldiers = [
  {
    name: "John", 
    shooting: 95,
    combat: 50,
    tactic: 88
  },
  {
    name: "Arnold",
    shooting: 97,
    combat: 72,
    tactic: 68
  }, 
  {
    name: "William", 
    shooting: 87, 
    combat: 86, 
    tactic: 97
  }
];

const filteredSoldiers = soldiers
  .filter(soldier => soldier.combat > 60) // Find every soldier where combat is higher than 60
  .map(soldier => {
    return {
      name: soldier.name,
      average: (soldier.combat + soldier.tactic + soldier.shooting) / 3
    };
    // map will return an array with the filtered soldiers, and we put their average and their name in there
	})
  .sort((a, b) => b.average - a.average);
  // Lastly we sort them high to low by their average score
  
console.log(
	filteredSoldiers.length > 0 ? filteredSoldiers[0].name : 'No soldiers with combat score higher thn 60'
);