I am not vying for a space on your fireteam so no worries but I want to say something kind of sad. I have been playing since September 9 when the game came out and not once, I am not joking here, have I ever gotten an exotic armour piece from an engram. I was seriously thinking it's impossible. So yup all my exotics are from xur because I just wasn't lucky. I see maybe one legendary engram a week, sometimes it takes two weeks. Of my inventory only my don't touch me's came from a chest in CE.