Question: who can craft ofieri armor?
Answer: Now, complete the quest From Ofier's Distant Shores to get 4 diagrams to craft the 4 pieces of armor for this achievement. You must then go to a master armorer (Yoana in Crow's Perch or one of the armorers in Beauclair) to craft these for you and, once you acquire the last piece, the achievement will pop.