Spoiler So for PvP, the answer to which ring is better is clearly the 'Ring of Crescent Guardian', as the Item Effect of the topaz ring specifies that it does not do extra damage to Humans. But, I'm curious about its viability for PvE. Obviously, a +2 AP difference and a bonus damage for a percentage of Max HP on certain skills, isn't going to be an insane amount different, but considering that off the market this item is half the cost as the Crescent, and likely somewhere around half the cost of the manos list price, if crafted in a workshop, this item may be viable/affordable. Combined, the low success rate of enhancing and the rate that one is able to get a base crescent ring, means that getting a Tet: Crescent could take a bit of time and silver Given that the main grind atm (Gyfin) and I believe the upcoming main grinds for drieghan are neither human or demi-human, it's at least something interesting to think about. The main issue with this is that we know Main Hand shown AP directly adds to the damage of awakening AP, and the 'Manos Topaz Ring' does not increase shown AP. Since I have no idea if this extra damage will work in the same way, it would need to be tested.
Market price? There hasn't been even sold one single TRI or TET of that crap. Have fun spending billions silver to enchant it yourself.