I don’t know whether or not this is working for other armor weights, but I’ve found that the Wurmslayer medium armor Visage and Grips’ stats cannot be changed in the mystic forge, while the medium armor shoulders can. I don’t know for sure whether the medium shoulders can actually be changed, as I’ve only gotten the hat and gloves and am going off of what I’ve heard from others who’ve gotten the gear who said they could change the shoulders.
What happens is when you go to put the Anthology of Heroes, Globs of Ectoplasm, the gossamer insignia, and the Wurmslayer Visage or Grips, neither the Visage or Grips show up when putting the items in the forge. I also don’t know whether this happens for the light or heavy armor variants as well.
As for my gear itself if this would help, I have selected stats on the Visage – Knight’s stats. The Grips I have not yet selected stats on, and neither have any infusions or runes.
