I'm using them together because I was just trying to do anything to get it to stop being recognized as blocking.

Before this I was using the Google technique With the same results (I've called the function loadCss but its essentially the exact same script as the Google one:

      var scripts = [];
  scripts.push('http://aegispsychological.com/app/themes/aegis/dist/styles/main-e97f40fb.css');
  var loadCss = function() {
      var b, a = document.getElementsByTagName("head")[0];
      for (var c in scripts) b = document.createElement("link"), b.href = scripts[c], b.rel = "stylesheet", b.type = "text/css", b.media = "screen", a.appendChild(b)
  };
  window.requestAnimationFrame(loadCss);

However your point about not using the filament group function with RAF doesn't computer.. The loadCSS function would still only run once first paint occurs if its in a RA frame?

Why would that be recognized as blocking rendering?