NPC Damage Types:

Guristas (Caldari) - Kinetic / Thermal
Serpentis (Gallente) - Thermal / Kinetic
Blood Raider (Amarr) - Thermal / EM
Sansha's Nation (Amarr) - EM / Thermal
Angel Cartel (Minmatar) - Kinetic / Explosive / Thermal
Minmatar Fleet (Minmatar) - Thermal / Explosive
Amarr Navy (Amarr) - EM / Thermal

Damage types to use:

Angel - EM(shields) Explosive(Armor), or thermal all round
Amarr Navy - EM (shield) Explosive(Armor)
Maru - Kinetic/Thermal
Mordus - EM (shield) Explosive(Armor)
Guristas - EM(shields) Explosive(Armor),
Thermal/Kinetic all round
Blood - Thermal
Sansha - Thermal
Serpentis - Thermal
Mercenary - Explosives
Caldary Navy - Explosives (Kine/Therm)
Khanid - EM(shields) Explosive(Armor)
Zazzmatazz - EM(shield)/Explos