You know that one of the items is not to be had in a dungeon but through a quest and some are available as 8th Anniversary rewards. That might speed up your collection a bit.
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Set Pieces:
Cloak of Humility - Obtained through the Gareth the Emissary of the RBC quest, once per character
Gauntlets of Valor - Obtained from PvE combat in the Anti-Virtue Dungeons or as an 8th Anniversary reward
Helm of Spirituality - Obtained from PvE combat in the Anti-Virtue Dungeons or as an 8th Anniversary reward
Gorget of Honesty - Obtained from PvE combat in the Anti-Virtue Dungeons and once, but no longer, through the Seeker of Truth Quests
Arms of Compassion - Obtained from PvE combat in the Anti-Virtue Dungeons
Legs of Honor - Obtained from PvE combat in the Anti-Virtue Dungeons
Breastplate of Justice - Obtained from PvE combat in the Anti-Virtue Dungeons
Sollerets of Sacrifice - Obtained from PvE combat in the Anti-Virtue Dungeons