Damage Dealt (EM/Therm/Kin/Explos)/r
Angel Cartel 7%, 9%, 22%, 62% / Exp - target painters
Blood Raiders 50%, 48%, 2%, 0% / EM - tracking disruptors, neutralizers
Guristas Pirates 2%, 18%, 79%, 1% / Kin - ECM
Mercenaries 9%, 7%, 31%, 50% / Exp, Kin
Mordu's Legion 0%, 30%, 70%, 0% / Kin
Rogue Drones 8%, 33%, 32%, 27% / EM, All
Sansha's Nation 53%, 47%, 0%, 0% / EM - tracking disruptors
Serpentis 0%, 55%, 45%, 0% / Kin - sensor dampeners
Imperial faction
Amarr 47%, 42%, 7%, 4% / EM, Therm
Caldari 1%, 48%, 51%, 0% / Kin, Therm
Gallente 1%, 39%, 60%, 0% / Therm
Minmatar 12%, 7%, 31%, 50% / Exp, Kin

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

Stacking Penalties
Mod 1 = 100% effect
Mod 2 = 87% effect
Mod 3 = 57% effect
Mod 4 = 28%