Cosmic anomalies are ranked in difficulty by 10 levels, these are:
Burrow (easiest)
Hideaway
Refuge
Den
Yard
Rally Point
Port
Hub
Haven
Sanctum (hardest)

.............Everything Burns............

** Main Damage type to shoot at the enemy **
Guristas - Kinetic/Thermal
Serpentis - Kinetic/Thermal
Mordus - Thermal & Kinetic
Blood - EM & Thermal
Sansha - EM & Thermal
Angel - Explosive/KIN/Thermal
Mercenary - Thermal
Corpum - EM & Thermal

** Damage types ***
to defend against
Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive / Thermal
Minmatar Fleet - Thermal / Explosive
Amarr Navy - EM / Thermal
Mordus - Kinetic / Thermal
Corpim