This is probably a very useless post. I am certain this information is readily available somewhere, but I cannot for the life of me find it.
How does one go about effectively farming for an Arcane Shield Traitstone? What are the options? Can you just ramp up the difficulty and run Broken Spire Challenges? Any advice would be appreciated. I am just trying to get a single one for the 3rd Templar trait, but no luck yet.