NPC's /weakest resist/damage done/:

Amarr thermal/ EM, thermal
Caldari kinetic/ kinetic, thermal
Gallente kinetic/ kinetic, thermal
Minmatar thermal/ all

Angel expolosive/ all
Blood raider EM/ EM, thermal
Guristas kinetic/ kinetic, thermal
Mercenaries Thermal/ all
Mordu Legion thermal/ kinetic, thermal
Rogue drones EM/ all
Rogue pirates thermall/ all
Sansha EM/ EM, thermal
Serpentis kinetic/ kinetic, thermal
The Seven thermal/ all
Thukker Tribe thermal/ all