Your controller value shouldn't include 'Controller'. So it should be...

RouteTable.Routes.MapRoute(
    "SomeName",
    "Login/index",
    new
    {
        controller = "Login",
        action = "Index",
        id = UrlParameter.Optional
    });

I've actually never used the ApplicationEventHandler method to hijack routes. I should try it.

If you continue to have trouble, you could try creating a class in your project root that inherits the WebBootManager to hijack routing. This is the way I learned and it has worked for me. An example of that would be:

    namespace Example.Web
{
    public class ExampleApplication : UmbracoApplication
    {
        protected override IBootManager GetBootManager()
        {
            return new ExampleBootManager(this);
        }

        protected override void OnApplicationStarting(object sender, EventArgs e)
        {
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }

    class ExampleBootManager : WebBootManager
    {
        public ExampleBootManager(UmbracoApplication umbracoApplication) : base(umbracoApplication) { }

        public override IBootManager Complete(Action<ApplicationContext> afterComplete)
        {
            RouteTable.Routes.MapRoute(
                "Home",
                "home/index",
                new { controller = "Home", action = "Index" }
                );
            return base.Complete(afterComplete);
        }
    }
}

Hope this helps. I'm sure someone more knowledgeable than myself will chime in.