The Origin and Lore of Equipment

I know this thread is old but i would be curious to know about the Siphai gear and the blind maiden's sash it just screams to me to be known.

Well the Sipahi gear originally in 1.0 was gear obtained from chests inside the Beastmen strongholds, they were locked and you needed to farm keys for a chance at getting them. Same for Warlock and Sentinel gear. I'd say Lore-wise this gear would be gear stolen from adventurers/city-state soldiers (anyone really) who ventured in and were slain/tempered by the Beastmen. As for where they are now in dungeons, I'd say the same. It's gear from dead adventurers.