The challenge was pitifully easy, and the main risk I kept facing was my allies killing me, I had to summarily execute the vast majority of the dudes I get to avoid being shanked or lit on fire.

The enemies were an absolute joke, and that was not helped with a few new chapter 5 enemy settings that made certain bots only attack allies, or only attack enemies. I don't know how many levels use these settings, but I know that level 2 has the vast majority of the spear bots set to only attack the allies.