"trust in the rust"

Damage types rats deal
Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - EM / Thermal
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive
Minmatar Fleet - Thermal / Explosive
Amarr Navy - EM / Thermal
Gallente - Kinetic / Thermal
Khanid - EM / Thermal
Mercenary - EM / Thermal
Mordus - Kinetic / Thermal
Drones - EM / Thermal

Rat Weaknesses
Guristas - Kinetic
Serpentis - Thermal or Kinetic
Mordu's Legion - Thermal or Kinetic
Blood Raiders - EM or Thermal
Sansha - EM or Thermal
Angel Cartel - Explosive
Mercenary - Thermal

Drones.
Gallente: Slowest drones, highest damage (Thermal)
Minmatar: Fastest drones, meh damage (Explosive)
Caldari: Longest range drones, horrible damage (Kinetic).... (Also, ECM drones! yay!)
Amarr: Who cares? (ok, really, tankiest drones (bleh, worthless), meh damage (EM)