Your naturally high penetration power, plus its increased power as you level, will mean that each shotgun blast will tear through more and more ZEDs. You excel the most in tightly packed hallways and rooms. Your weapons are made for close combat fighting, shotguns will decimate the heads of large ZEDs in most circumstances, and you don't need to be in the thick of things to be effective. You're a very strong crowd thinner perk: unlike Demolitionists, who suffer from a lack of self-defense options Commandos, who fare poorly against large ZEDs or Berserkers, who need to get up close and personal your strong points overcome all of their weaknesses.