Damage types caused:

Guristas - Kinetic 2 / Thermal 2
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic 1 / Explosive 3
Minmatar Fleet - Thermal / Explosive
Amarr Navy - EM / Thermal
Caldari Navy - Kinetic 2 / Thermal 2
Gallente - Kinetic / Thermal
Mercenary - EM / Thermal / Kinetic
Mordus's Legion - Kin/Thermal
Drones - EM 2 / 2 Thermal
Khanid - EM / Thermal
Thukker - Explosive
EoM - Kinetic

Best Damage to do to NPCs:

Amarr - Thermal
Guristas - Kinetic
Serpentis - Thermal, use Kinetic against BS's
Mordus - Kinetic
Blood - EM & Therm
Angels - Explosive
EoM - Kinetic/Thermal

Drone damage
thermal
hobgoblin, hammerhead, ogre, garde

explosive
warrior, valkyrie, berserker, bouncer

em
acolyte, infiltrator, praetor, curator

kinetic
hornet, vespa, wasp, warden