The Hive Mind has been known to change and adapt when confronted with new foes and situations. So lets say that a tendril of a hive fleet that was thought destroyed has started to feast on worlds that either Renegade or out right Chaos Worshipers. So its vanguard organisms like the Lictor are sent forward. Many of the chaos worshipers have seen and done things most have not making them a bit more jaded to the psychological warfare used by some Hive Fleets.
How would you change the Hive Mind as it adapts to dealing with such things? They would of course outright avoid Daemon-Worlds since there would be little if at all actual biological material to be found. But many of worlds along the outer part of the screaming vortex would be perfect targets. I am also not saying that this tendril of a hive fleet falls to chaos, not at all. But weapons and tactics used to fight a foe that has seen what some chaos worshipers have seen would cause the Lictors to act differently than they would on say an agri-world.
Thanks for the help