Sensors
Minmatar - Ladar
Caldari - Gravimetric
Gallente - Magnetometric
Amarr - Radar

Hardeners to use
Angels - Exp/Kin
Amarr Navy - EM/The
Blood Raiders - EM/The
Caldari Navy - Kin/The
Gallente Navy - Kin/The
Guristas - Kin/The
Khanid - EM/The (other damage types often mixed in)
Mercenary - EM/The (Kin missiles)
Mordus - Kin/The
Odamian - Kin/The
Rogue Drones - Exp/Kin with some EM (queens and rulers)
Rogue Pirate - all types, no focus
Sansha - EM/The
Serpentis - Kin/The

Damage to use
Drones - EM
Guristas - Kinetic
Serpentis - Thermal
Mordus - Thermal, Kinetic
Blood - EM, Thermal
Sansha - EM, Thermal
Angel - Explosive

*** Rat nest easier to harder ***
Hideaway Burrow Refuge Den Yard Rally pt Port
Hidden Forsaken Forlorn