Stacking Penalties
Module Effectiveness
1st 100%
2nd 87%
3rd 57%
4th 28%
5th 10.5%
6th 3%

150,000,000 = 1 AU
750,000,000 = 5 AU
1,500,000,000 = 10 AU
1,950,000,000 = 13 AU

Enemies ------- Hardener to use ------ Damage type to use

Blood Raider --- EM/Thermal --------------- EM
Guristas ------- Kinetic/Thermal ------------ Kinetic
Sanshas ------ EM/Thermal --------------- EM
Serpentis ------ Thermal/Kinetic ------------ Kinetic
Angel. --------- All Resis (pri. Expl. ,Kin.) -- Explosive
Mordus -------- Kinetic/Thermal ----------- Kinetic
Rogue Drones -- All Resis (pri. Expl. kin) ---- EM
Mercenary ----- All Resis (pri. EM, Therm) -- Thermal
Minmatar. ----- All Resis ---------------- Thermal (sec. Explosive)
Gallente. ------- Kinetic/Thermal (sec..EM) --- Thermal
Amarr --------- EM/Thermal. -------------- Thermal
Caldari -------- Kinetic/Thermal ----------- Kinetic
The Seven ----- All Resis ---------------- Thermal
EoM------------Kinetic/Thermal