NPC Damage Vulnerabilities (You Use):
Angel Cartel: Explosive
Blood Raiders: EM
Equilibrium of Mankind: Kinetic
Sleepers/Drifters: Omni
Triglavian Collective: Thermal, Explosive, EDENCOM NPCs
Guristas Pirates: Kinetic
Khanid Kingdom: EM
Mordu's Legion: Kinetic
Rogue Drones: EM
Sansha's Nation: EM
Pandemic Horde: Fireworks, Smartbombs, Telling them their SRP is bad.
Serpentis: Thermal/Kinetic
Mercenaries: Kinetic, Thermal
Thukker: Thermal
Amarr: EM/Thermal
Caldari: Kinetic/Thermal
Gallente: Thermal
Minmatar: Thermal
CONCORD: Kinetic, Thermal
Outer Ring Excavations / ORE: EM, Thermal
Servant Sisters of EVE: EM
EDENCOM: Varies by Faction, Sansha's Nation NPCs

Faction Combat Sites By Difficulty:
Hidden < Forsaken < Forlorn
TEST Alliance Fortizar (Easiest) (0)
Burrow / Drone Collection (1)
Hideaway / Drone Cluster (2)
Refuge / Drone Gathering (3)
Den / Drone Gathering (4)
Yard / Drone Surveillance (5)
Rally Point / Drone Menagerie (6)
Port / Drone Herd (7)
Hub / Drone Squad (8)
Haven / Drone Patrol (9)
Sanctum / Drone Horde (Hardest) (10)