The defiant and nadroji items go in the ultra rare legends category (found from powerful enemies category).
Have a look at this useful guide:
This guide will help you get rare legend so much easier. I already got far too many nadrojis and some other rare legends. I even got eternal versions of nearly all Nadroji gears.
I also got a crystal insolence and some other insolence and mutiny as well as eternal ragnarok and some vacuus scipio (not bow though). I got nearly 2 premium stash full of rare legends and most of them I haven’t used.