The Scions Of Giovesse, Fighters guild helm and Pauldron's of the Ivory Brigade were originally Heavy armor Frostbite unique quest rewards the came form Blackwood Quests. I've been using them extensively up until the most recent patch upon which they were all mysteriously changed to (Yuck) Bograider. This was a complete undocumented (and quite frankly unwelcome) change that broke mine and possibly several other players builds. Hoping to see this undone at some point because it was an awesome unique way to have the sets available in a weight they normally don't drop in.