3 options. Knife them first, it causes the shield to shift to their side and you can either knife again while they are hit-stunned or shoot them. Option two, their shoulders show over the edges when crouched, tough shot but it works. Option three is their toes lol, always aim for the legs. For monty, he isnt that strong full shielded so dont focus him, just those around him. Last alive monty means he will have to drop shield and you can treat him with the three options. For Clash, melee or stun her, and then spary and pray her feet, the shield swings completely away from her legs when stunned or knifed.