I have noticed something while playing this game. There are a lot of modifiers for missions (like the burns, light switch, epic, juggler, etc) why not add a story playlist (like the stile playlist where you do random missions in a random order) with random modifiers (always with nightfall modifier active) and scaled to 28. For a reward for completing one of these missions in this new game mode you are granted a cryptarch package like the tiger strike playlist.