I've completed the class equipment sets for all classes except Warden and Arcanist. Last night, I was running my Warden through the archive and got a Warden set piece for completing Arc 1. But after finishing Arc 2, a Templar piece dropped - a duplicate piece, as I'd already finished the Templar set. At the end of Arc 3, I got a Nightblade set piece. Again, a duplicate.
Why don't Arcs after the first drop unique set pieces until all class sets are filled?
~Deedleqwerty [PS4] / NA / EU
CP 1980 NA / CP 1400 EU
Aldmeri Dominion - Wardevils
See you in Cyrodiil