As far I played I think I saw all the drops from them, they all have the same for their elements,
-Dragon Bone (element)
-Dragon Bone + (element)
-Litograph (element)
-Litograph + (element)
-Litograph ++ (element)
-Idea Core (element)
-Idea Core + (element)
-Raid boss SR Weapons (element)
-Raid boss SR Eidolon (element)
-Stone shards

The + and ++ are for the upgraded version of each drop
The element thing is to explain that each boss drop he's elemental drops
I hope i helped also sorry if my english isn't the best ^^