Based on experience, all jewelry and medal are the hardest to drop. The suggestion by @Gnomish_Inquisition is a sound, you should try do SR 70+ on normal since the loot is more skewed towards epic. Ultimate totem + act boss + dungeon is the way to go to spend time on same sessions farming and less boring compared to SR run.
And since you already post on the forum, RNGesus consider this as tribute and may grant you the item you seek, soon.