Hi! Items with ilevel 200 from heroics have no icon, just the bossname. Maybe you could add the heroic (10 man raid) badge icon for them which is currently used for the items bought from the dalaran vendor: Arcanist Ivrenne?
And Items from professions could have the profession icon? (Blacksmithing, Leatherworking, Tailorin, Jewelcrafting for trinkets).