NetherRealmsRegex

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;

public class NetherRealms
{
    public static void Main()
    {
        var demonNames = Console.ReadLine().Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);
        var demonsList = new List<Demon>();

        foreach (var name in demonNames)
        {
            var currentDemon = new Demon(name);
            currentDemon.Damage = CalcDamage(name);
            currentDemon.Health = CalcHealth(name);
            demonsList.Add(currentDemon);
        }

        foreach (var demon in demonsList.OrderBy(d => d.Name))
        {
            Console.WriteLine($"{demon.Name} - {demon.Health} health, {demon.Damage:f2} damage");
        }
    }

    static double CalcDamage(string name)
    {
        Regex regexNumbers = new Regex(@"([\+|-]*\d+\.?\d*)");
        Regex regexOperators = new Regex(@"([\/\*])");

        MatchCollection matchesNums = regexNumbers.Matches(name);
        MatchCollection matchesOps = regexOperators.Matches(name);

        double damage = 0d;

        foreach (Match match in matchesNums)
            damage += double.Parse(match.Groups[0].ToString());

        foreach (Match match in matchesOps)
        {
            switch (match.Groups[0].ToString())
            {
                case "*": damage *= 2.0; break;
                case "/": damage /= 2.0; break;
                default:
                    break;
            }
        }

        return damage;
    }

    static int CalcHealth(string name)
    {
        Regex regex = new Regex(@"([^0-9\+\-\*\/\.])");
        MatchCollection matches = regex.Matches(name);

        int health = 0;

        foreach (Match match in matches)
        {
            char currentChar = match.Groups[0].ToString()[0];
            health += (int)currentChar;
        }

        return health;
    }
}

public class Demon
{
    public string Name { get; set; }
    public double Damage { get; set; }
    public int Health { get; set; }

    public Demon(string name)
    {
        Name = name;
    }
}