So I love using archons as PC allies in my campaigns. Only problem is they aren't in the Monster Manual (I love the book - something had to go to make room for all that awesome), so I came up with my own stats for them. I'm talking about the celestial variety, not the elemental variety (which are also cool). Take a look and let me know what you think.
http://worldbuilderblog.me/2015/04/16/5e-archons/
http://worldbuilderblog.me/2015/04/16/5e-archons/