*** Stacking Penalities ***
1st mod: c(1) = 100,000% effectiveness
2nd mod: c(2) = 86,9119842% effectiveness
3d mod: c(3) = 57,1037996% effectiveness
4th mod: c(4) = 28,2469117% effectiveness
5th mod: c(5) = 10,5988834% effectiveness

*** Targeting systems ***
Minmatar - Ladar
Caldari - Gravimetric
Gallente - Magnetometric
Amarr - Radar

** 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
Mordus - Kinetic / Thermal

*** Main Damage type to shoot at the enemy ***
Guristas - Kinetic
Serpentis - Thermal
Mordus - Thermal & Kinetic
Blood - EM & Thermal
Sansha - EM & Thermal
Angel - Explosive
Mercenary - Thermal
Corpum - EM & Thermal

-Here is some useful info...copy, paste and pass
along-

** 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 type to protect against **
Angel - All
Amarr Navy - EM & Thermal
Blood - EM & Thermal
Caldary navy - Kinetic & Thermal
Gallente - Kinetic & Thermal
Guristas - Kinetic & Thermal
Khanid - EM & Thermal
Mercenary - EM & Thermal & Kin
Mordus - Kinetic & Thermal
Sansha - EM & Thermal
Serpentis - Kinetic & Thermal

** Main Damage type to shoot at the enemy **
Guristas - Kinetic
Serpentis - Thermal
Mordus - Thermal & Kinetic
Blood - EM
Sansha - Thermal
Angel - Explosive
Mercenary - Thermal
Drone - EM