Legendary acc for BD

[Dioron]

I want to start doing bt but im not sure which of the legendary acc that drop from there are better than the ones dropped from the 4 big purple dungeons.

[KurooSakura]

anything from bt > everything else 

[Kayama]

ring and earring only regardless of your build but preferably lightning aka lode ring(3rd boss) + supernova earring(first boss).  on another chapter u want  DT necklace + NF necklace for set effect but dont take them  more than stage 6 its a waste of resources