Yeah the Abjs are not hard to get but the -1 pieces are, so I will have to go with NQ for them. What is the first set of Merlinic used for if not MB O.o? Sorry I really don't know a lot lol. I've heard of that earring, someone told me Bakarole too? and then Refoccilation stone and Mizukage - no - kubiki? This all sounds super difficult to get haha
First set is for free nuking. Second set COULD be used for MB, it depends on you and your inventory and luck from stone augments. It's possible to get all in one set tbh, but most people aren't so lucky.
Barkarole Earring is a 2~ hour questline.
Refoccilation Stone is from Warder of Hope in Escha Ruaun.
Mizukage-no-Kubikazari comes from Tenzen v2 BC.
All easy enough at this stage of the game.