Purifying Empowerment Catalysts

Currently, Purifying Empowerment Catalysts drop from most chests from e10 and up. However, getting a purifying catalyst means that you won’t be getting any other catalysts. If you look on the Auction House, you’ll notice that these items are not worth much, and from that we can conclude that nobody really wants them other than new players who are still short on Anima Shards because of the museum. This is not the case for players who run say e17 content regularly. Hence I would like to ask you to look into where these items drop and more importantly, where they should not.