For those working on subclass quests

Found the easiest way to complete part 8 is grab 2 other fireteam members start a septiks strike (devils lair) run all the way back to patrol area to the basement where 3 hive knight majors spawn. Weaken them and blast your supers go back up top and do it all over again. Finish strike for win. Other places to consider Undying mind strike in legacy playlist, get boss to quarter health and 6 vex major continues to spawn Nexus strike, 2 minotaur and hob goblin hallway before the templar boss, kill them and suicide to respawn them