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 Resist (Explo/Kin) ----- Explosive
Mordus ------- Kinetic/Thermal ----------- Kinetic
Rogue Drones - All Resist (Explo/Kin) ----- EM
Mercenary ----- All Resist (EM/Therm) ---- Thermal
Minmatar. ----- All Resist --------------- Thermal/Explo
Gallente. ------ Kinetic/Thermal (sec. EM) - Thermal
Amarr -------- EM/Thermal. ------------- Thermal
Caldari ------- Kinetic/Thermal ----------- Kinetic
The Seven ---- All Resist --------------- Thermal
EoM ---------- Kinetic/Thermal ---------- Kinetic
Khanid -------- EM/Thermal -------------- Thermal

Drones:
Assembly->Gathering->Surveillance->Menagerie->Herd->Squad->Patrol->Horde