I'm cool with getting separated from my NPC's, any way works just let me know in advance how the division goes down.
Also
@Jbcool Marcus has fought Chaos cultists (With a small number of encounters with daemons), along with small Ork tribes within Imperial territory (though Vernum was their first time fighting against a force under the command of a Warboss. They got decimated because of both that, and being misused by Van Deer). He's never fought anything with superior equipment or organization, like Chaos Space Marines, Eldar forces, or Tau Hunter Cadres.
Just as a sidenote in case this is needed, the combat doctrine of the Flashflooders is to harass and overwhelm the enemy; forcing them outside of close quarters and leave them exposed to other long ranged weapons such as artillery and heavy weapons. They're not necessarily meant to neutralize all hostiles in a close quarters environment, instead they flush (or flood) them out through intimidation and overwhelming firepower to throw the enemy out of position. That's how they were misused in the Vernum crusade, because they were expected to clear the trenches and factories out completely.