Okay I know I'm stupid but here goes.
After graduating from imbued bronze bar, I say well ... I got to work on Imbued Iron bar for better XP.
Now that I got a good stack let's go apply those to some lair room .... DEUH!!!! it's not used anywhere.
I know not VI fault (well maybe arent they old devs), but why give formulas and allow to make stuff if no usage of the item is put in place?
Anyway guildies had a good laugh from this experience.