Damage type to protect against:
Angel: 70% Explosive & 20% Kinetic & 10% EM
Amarr empire: 50% EM & 50% Thermal
Blood raider: 50% EM & 50% Thermal
Caldari state: 50% Kinetic & 50% Thermal
EoM: 75% Kinetic & 25% Thermal
Gallente federation: 50% Kinetic & 40% Thermal / 10% EM
Gurista: 75% Kinetic & 25% Thermal
Khanid - EM & Thermal
Mercenaries: 50% Thermal & 30% Kinetic & 10% Explosive & 10% EM
Minmatar republic: 50% Explosive & 20% EM & 20% Kinetic & 10% Thermal
Mordus - Kinetic & Thermal
Rogue drones: 70% Explosive & 20% Kinetic & 10% Thermal
Sansha: 50% EM & 50% Thermal
Serpentis: 50% Kinetic & 50% Thermal

Main Damage type to shoot at the enemy:
Guristas - Kinetic (Gravimetric)
Serpentis - Thermal (Magnetic)
Mordus - Thermal & Kinetic (Gravimetric)