Judging by the fact that it requires cermet....the alchemy skill required for this is somewhere around lvl 51~60, i forget the exact lvl when I made these, maybe 54~58?
Edit...clicked on cermet chunk link and there are 3 caps for the 3 recipies....last one does indeed cap at 60
Cursed items are uncursed to make rare/ex armor pieces. To uncurse them you need a type of Abjuration, which for this armor is Martial, and can be dropped off Nidhogg to create Koenigs armor.