NPC damage (Dmg=best/second best damage to use, Tank=best hardeners to use):
Amarr Empire: EM/Therm Dmg + EM/Therm Tank
Angel Cartel: Exp/Therm Dmg + Invuln/Exp Tank
Blood Raiders: EM/Therm Dmg + EM/Therm Tank
Caldari State: Kin/Therm Dmg + Kin/Therm Tank
EOM: Kin/Therm Dmg + Kin/Therm Tank
Gallente Federation: Therm/Kin Dmg + Therm/Kin Tank
Guristas: Kin/Therm Dmg + Kin/Therm Tank
Mercenaries: Therm/Exp Dmg + Invuln/Exp Tank
Minmatar Republic: Therm/Exp Dmg + Invuln/Exp Tank
Mordu's Legion: Therm/Kin Dmg + Kin/Therm Tank
Rogue Drones: EM/Therm Dmg + Exp/Kin/Invuln Tank
Sansha's Nation: Therm/EM Dmg + EM/Therm Tank
Serpentis: Therm/Kin Dmg + Therm/Kin Tank
Seven: Therm Dmg + Therm/Exp Tank

ENEMY WEAK AGAINST THESE DAMAGE TYPES:
*same as what they use*