*NPC's are vulnerable to**
Guristas = Kinetic
Angel = Explosive
Serpentis = Thermal/Kinetic
Thukker Tribe = Thermal
Ammatar = Thermal
Blood Raider = EM
Sansha\xb4s = EM
Khanid Kingdom = EM

http://eve-survival.org/wikka.php?wakka=MissionReports

** Damage types ***
Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive / Thermal
Minmatar Fleet - Thermal / Explosive
Amarr Navy - EM / Thermal

Damage done by:
Guristas = kinetic/thermal
serpentis = thermal/kinetic
blood raider = thermal/em
sansha's = em/thermal
angel's = expl/kin
minmatar = expl/kin
ammar navy = em/thermal
mordu's legion = em/thermal/kinetic
mercenaries = kinetic/thermal