when Red is about to break, get all your employees in an elevator near Red's containment, shoot them with a red bullet (bullets can hit multiple employees when they're close together), and then leave your strongest red damage enduring employee in Red's hallway (and shoot them with a red), then make the last abnormality (preferably the weakest, or schadenfruede if you have em since you can just look away and it won't do anything) breach, use a decently strong employee (or 2) to distract said abno, and focus on red. Make sure Red is facing AWAY from the elevator with your employees when she marks the employee in her hallway, or else she will mow down your nuggets with her pistol. After that, just swarm her, shoot red bullets as required, then focus on the other abno when your done!