Damage to protect against: Amarr Navy: EM and thermal. Angel: All, mostly explosive and kinetic. Blood: EM and thermal. Caldari Navy: Kinetic and thermal. EoM: Kinetic and thermal. Gallente Navy: Thermal and kinetic. Guristas: Kinetic and thermal. Khanid: Kinetic. Mercenary: All. Republic fleet: All, mostly explosive and kinetic. Mordu's: Kinetic and thermal. Rogue drones: All. Sansha: EM and thermal. Serpentis: Thermal and kinetic. Syndicate: All, mostly kinetic and thermal. Thukker: Thermal.
fun fact: in you are ninja mining core gas site with double T2 gas harvester prospect, you can get 240 C540 before rats spawn