Out of the 40 purple engrams I collected I only had 1 turn into purple hood and 1 into an exotic piece of armor. The drop rates for the harder strikes suck and Im sick and tired of the purple engrams changing into blue stuff 6 levels below mine. I did a hard strike 2 nights ago and 1 guy on my team sat hiding the entire round. Granted, it kept me and the other guy alive by allowing us to re-spawn and the baddies did not go after him, but to give him a purple helmet when he fired 2 shots is complete BS.