There are four pillars which support the world...the wisdom of the wise, the justice of the great, the prayers of the righteous and the valor of the brave.

-Smallest to Largest Site
Burrow > Hideaway > Refuge > Rally Point > Den > Yard > Port > Hub > Haven > Sanctum

-Easiest to Hardest Site-
Hidden > Forsaken > Forlorn

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