*Damage type*
Amarr Navy - EM/Therm
Angel Cartel - Explosive/Kinetic some Therm/EM
Blood Raider - Therm/EM
Caldari Navy - Kinetic (lots), some Therm
Drones - Mix (EM mostly)
Guristas - Kinetic / Thermal
Mercenary - Mix (Kin/Therm mostly)
Sansha's Nation - EM / Thermal
Serpentis - Thermal / Kinetic

*Damage types to use* Best - Worst
Angel - Explosive, Kinetic, Thermal, EM
Amarr Navy - EM, Thermal, Kinetic, Explosive
Caldari Navy - Kinetic, Thermal, Explosive, EM
Gurista - Kinetic, Thermal, Explosive, EM
Blood - EM, Thermal, Kinetic, Explosive
Drones - EM, Thermal, Kinetic, Explosive
Sansha - EM, Thermal, Kinetic, Explosive
Serpentis - Kinetic, Thermal, EM, Explosive

Multi-modules penalty:
1st mod: c(1) = 100,000% effectiveness
2nd mod: c(2) = 86,912% effect
3d mod: c(3) = 57,104% effect
4th mod: c(4) = 28,247% effect
5th mod: c(5) = 10,599% effect
6th mod: c(6) = 2,999% effect