Well. As far as i can tell, you can only aim to be the best with what you've taken.
Rally Point - 6
Port - 7
Hub - 8
Haven - 9
Sanctum - 10
Enemies ------- Hardener to use ---- Damage type to use
Guristas ------- Kinetic/Thermal -----------THERMAL
Blood Raider --- EM/Thermal -------------- EM
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