Not a lot of info for Armorsmithing...
the basics of leveling armor smith are those insignias, armor lining, and armor casings. 1 lining+1 casing for each body part + the insignias in the discovery tab will level you up fast. i leveled all the way to 400 with the discovery tab, did not craft anything extra besides boxes to carry things. i crafted a full rare set for my warrior to run around with, so i felt like it was worth it for me
For my armorsmith. I made 6 of one type of insignia them made one of each of the different parts. Total of 18 items. Then go to discovery and make the 6 pieces of armor. Normally it took me 1 to two sets of armor to reach the next tier of insignia’s.