Damage Types to use on NPCs:
Angel - Explosive
Blood - Thermal
Drones - EM
Gurista - Kinetic
Mercenaries - Thermal
Mordus - Thermal & Kinetic
Sansha - EM & Thermal
EoM - Kinetic

Damage Dealt by NPCs:
Amarr Navy - EM/Thermal
Angel Cartel - All
Blood Raider - Thermal/EM
Caldari - Kinetic/Thermal
Gallente - Kinetic/Thermal
Guristas - Kinetic/Thermal
Minmatar Fleet - Thermal/Explosive
Mercenaries - Kinetic/Thermal/Explosive
Mordu's Legion - EM/Kinetic/Thermal
Rogue Drones - All Types
Sansha's Nation - EM/Thermal
Serpentis - Kinetic/Thermal
Eom - EM