Good Eye, the Wiki is wrong here, Jehungir is Hyrkanian and can build the Hyrkanian Armor, and Joka Ironfist is Hyborian without any special armor. Thanks for that and fixed allready. Now it makes sence 
But in general, not every Cimmerian armorer can build cimmerian Armors, not every darfari Armorer can build Darfari armors and so on. If you look closely you will see sometimes they can do the faction and / or Race armor or some can do both. But not all can do their Race AND Faction related Armor, i guess thats intended.
At the other hand we have some T4 Thralls who still can do nothing special, i dont know if these are placeholders for future updates or just forgotten ones. BUG | poor Chelkus, Diana and Than cant build anything special as T4
Thats absolutely right and allready reported without an answer or just even noticed, idk.
And i dont know why i have to mail this to another User, arent we in the Funcom Bug section here ?
A lot of Reports was send back in the days, without any lifesign. Every mistake in Armorers and thier reciepes are allready in the Wiki shown under NOTES whats wrong with them. I posted them in here, again and again. Sometimes after a while if nothing is happend i reactivate these reports to bring it up to their attention, hopefully it get noticed.
So if someone stick their nose into these 2 Armorers, they also has a shield problem
But no worries, i am up to repost these Bugs again and again if nothing will happened 
greetz SirBowen