My experience so far:
Runed fabrics and +8 low level items: dorion mobs
+8 accesories : dorion bosses
Pole scythe : skull splitter
heavy plates: death valley black mummy
elites: hagard black mummy, stinger
Warbow, war scythe, earthshaker: most of hagard mobs
Imparator: hagard overseer
No need to mention abt epic items i guess, undead king, deathlord, archdemon
Ofc i looted same items from other mobs but from these mobs i received at higher rate
Good luck everyone