Damage type to protect against:

Amarr - EM & Therm (0.5em/0.5therm)
Angel - Kinetic, EM, Thermal & Explosive (0.7exp/0.2kin/0.1em)
Blood - EM & Thermal ((0.5em/0.5therm)
Gallente Federation - Kin, thermal, EM (0.5kin/0.4therm/0.1em)
Guristas - Kin & Therm (0.5kin/0.5therm)
Mercenary - Kinetic, EM, Thermal & Explosive (0.5therm/0.3kin/0.1exp/0,1em)
Minmater Republic - exp, em, therm (0.5exp 0.2em 0.2kin 0.1therm)
Mordus - Kinetic & Thermal
Rogue Drones - Kinetic, EM, Thermal & Explosive (0.7exp/0.2kin/0.1therm)
Sansha - EM & Thermal (0.5em/0.5therm)
Serpentis/Caldari - Kin & Therm (0.5kin/0.5therm)

Damage types to use:

Guristas - Thermal Kinetic
Serpentis - Thermal Kinetic
Mordus - Thermal Kinetic
Blood - EMP Thermal
Sansha - EM Thermal
Angel - Explosive (Fusion) Kinetic
Mercenary - Thermal kinteic

Missiles:

Inferno=Thermal
Mjolnir=EM
Nova=Explosive
Scourge=Kinetic

Projectile:

EMP=EM
Fusion=Explosive
Plasma=Thermal
Quake=Kinetic/Explosive