Beast (Examples: Juggernaughts, Steeds of Slaanesh)
Servant (ex: Flamers of Tzeentch, Nurglings)
Warrior (Ex: Bloodletters, Plaugebearers)
Knight (Ex: Daemonettes on Slaanesh steeds, Bloodletters on
Juggernaughts of Khorne)
Greater Deamon (Think Count or Baron. Ex: Bloodthristers, Lords of
Change)
Deamon Lord (Kharn, Juijaeg, Merghon)
Deamon King (There are only recordings of four of these, Kharzhan killed the other three and was then
banished himself by Hrodwulf Le'man)
Deamon Princes are mortals who've been granted deamon hood by their gods. They still have the thoughts
and desires that they had as mortals, so they generally rank lower than Deamon Lords, who are deamons
since... hmm... 'birth'. (Ex: A'mon Ch'aka'i, Githu Poisonbite)