This just isn't true.... Post patch the best way of obtaining legendarys in pve (other than with marks or queens gear) IMO is leveling up cryptarc and praying for one or two in the mail. Busting out strikes fast and getting the rare engrams at the end is what leads to leveling up cryptarc. In the end though it's all just luck. This game is driven by luck. I've yet to see a legendary engram drop in a tiger strike post patch. I've seen 2 exotics and a couple legendary rewards at the end of strikes.