Harvesters have no formal organization easily identified by their signature scythes and sickles. They balance life and death taking life so they might restore it elsewhere.  

Harvesters travel the lands hunting evil and chaotic forces slaying them to absorb their life force. Harvesters store the life force from those they slay with their scythes and can use it to create powerful restorative magic. Their magic does not cause pain in the healed and is one of the few restoratives magics that can cure diseases, restore limbs, fix birth defects, and can cure almost anything save for death. 

Harvesters have no formal organization and thus no standardized ranks.