Another thing to try is multi-looting. Make sure you have Master Identify Item or a Scholar. Save near a dead dragon that is in a safe position. Loot dragon, look at item. DON'T save. Reload, loot dragon. Just doing this multiple times will show you many of the available higher level items. Every now and then you'll get an item and the dragon won't disappear. You can keep item & gold by saving (if you want) and then reload. This is multi-looting. If you don't mind the time involved, you can get hundreds of items from one dead dragon, including A&Rs. There are 15 Relics and 15 Artifacts in game. Before you collect the 5 placed A's, you can collect 13 of the 30 A&Rs. Once 13 A&Rs have been brought permanently into game you can only add the 5 placed A's for a max of 18. You can have 2 each of the placed Artifacts. Whether you make a conscious effort to multi-loot in the game and to what extent is up to you.