Was the same in my case… And its RNG, but there is something very strange with BG…
But yeah, the total LACK of ANY T4 is what is a surprise…
As I still miss 2 armorers, I clear BG EVERYDAY at least 2 times and this week, there was NO T4 (besides the fighters sometimes)
“My journey” started When was the last time you saw a T4 armorer? at 27 September. With several times a day clearing it until Oct 3rd the FIRST T4 finally spawned…
PS.: It looks like at some point it wasnt so bad. But thats > 6 months ago… And most people who get their thralls, was from that time.
PPS.: I always take a run in Sepermeru (grabing some Khari steel) and usually there is at least 1 T4 standing in the city. Which I dont bother taking home anymore, as I have all besides 1 armorer from there.