Cloned Flesh: Refers to all humanoid Grineers, including bosses.
Ferrite Armor: Consists of all light/medium Grineers such as Lancers and Scorpions. This includes heavies like Heavy Gunners and Commanders. Humanoid Corpus bosses are also classified in this.
Alloy Armor: Possessed by Elite Lancers, Eviscerators, Bombards and Napalms. Also possessed by all Grineer bosses and Corpus Robotic bosses.
Machinery: Includes Rollers, Regulator and Latchers.