You said it. Just some group attacking others at random like the Saviors, but without the overwhelming numbers. They have to see that they would be much better off working with others instead of attacking them, right? I mean, bull-rushing into every battle without a strategy just continues to dwindle their numbers, right?
What would be really interesting, and where I would give the writers credit, is if we found out that Maggie was to the Reapers what Negan was to Alexandria, and the Reapers are just trying to get vengeance on Maggie.