Here is some useful info:
Copy, paste and pass along...

*** Damage types to protect against ***
Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive / Thermal
Minmatar Fleet - Thermal / Explosive
Amarr Navy - EM / Thermal

*** Damage types to shoot at the enemy ***
Guristas - Kinetic
Serpentis - Thermal
Mordus - Thermal & Kinetic
Galente Navy - Explosive
Blood - EM & Thermal
Sansha - Thermal
Angel - Explosive
Mercenary - Thermal