Few people can comprehend the awesomeness of Samuel Westinghouse. That is why there's nothing more written here.

(Thanks Sinagain :)

Resists
Angel - Kinetic, Explosive
Blood - EM & Thermal
Drones - Kinetic, EM, Thermal & Explosive
Guristas - Kinetic & Thermal
Mercenary - Kinetic, EM, Thermal & Explosive
Mordus - Kinetic & Thermal
Sansha - EM & Thermal
Serpentis - Kinetic & Thermal

Damage Types

Main Damage type to shoot at the enemy:
Angel - Explosive
Blood - Thermal
Drones - EM
Guristas - Kinetic
Mercenary - Thermal
Mordus - Thermal & Kinetic
Sansha - Thermal
Serpentis - Thermal