Best damage to deal against NPCs
Guristas - Kinetic
Serpentis - Thermal
Mordu's Legion - Thermal / Kinetic
Blood Raider - EM
Sansha's Nation - EM
Angel Cartel - Explosive
Mercenary - Thermal
Rogue Drones - EM
Amarr Navy - Thermal
Caldari State - Kinetic
Gallente Navy - Thermal

Damage to tank:
Guristas ------------- Kinetic / Thermal
Serpentis ------------ Thermal / Kinetic
Mordu's Legion ------- Thermal / Kinetic / EM
Blood Raider --------- Thermal / EM
Sansha's Nation ------ EM / Thermal
Angel Cartel --------- Explosive / Kinetic
Mercenary ------------ ALL
Rogue Drones -------- ALL
Amarr Navy ---------- EM / Thermal
Caldari State --------- Kinetic / Thermal
Gallente Navy -------- Thermal / Kinetic
Minmatar Fleet ------- ALL (varies)
EOM ----------------- Kinetic, Thermal