Well, i've never gotten exotics from the crucible before, but i have gotten 4 legendaries. I got the Fair and Square pulse rifle from a purple engram, an LDR 5001 from a Crucible postmaster package, MG18A Harm's Way from a purple engram, and the Devil You Don't from a BLUE engram. Would've gotten more but i don't really like crucible. Because i never get exotics from it. It's pure RNG. I suggest Tiger Strikes when you want them exotics.