Stacking Penalties:
100. 87, 57, 28, 10.5, 3

Npc Damage Inflicted
Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive / Thermal

Best Damage to NPCs
Angel (Minmatar) - Explosive / Kinetic
Blood (Amarr) - EM / Thermal
Drones - EM / Thermal
Guristas (Caldari) - Kinetic / Thermal
Mercenary - Kinetic / Thermal
Mordus (Amarr) - Kinetic / EM
Sansha (Amarr) - EM / Thermal
Serpentis (Gallente) - Kinetic / Therm

Not yet begun to decay - Over 24 hours
Beginning to decay - Between 24 & 4 hours
Reaching the end of its life - Less than 4 hours
On the verge of collapse - 15 minutes or less

Levels > Hideaway->Burrow->Refuge->Den->Yard->Rally point->Port->Hub->Haven->Sanctum