I feel like this is just opening myself up to trolling and abuse but here goes anyway.
I really don't know which Seekers of Adoulin ring to go for. My mains are PUP and WHM. Both rings are respectively BiS.
WHM: at the moment, I don't think I'll miss the cure pot, but the extra enmity down seems nice. Surely a must have for serious WHM?
PUP: usage is even more situational but nothing else comes close, does it?
PUP imo. WHM ring is really just cure potency. With +2 neck and regular Cure set you should be at -50 enmity easily. Cure potency is nice, but nothing game breaking. PUP ring is probably also not game breaking, because you can find alternatives set without it and they are barely worse afaik. Generally the best ring is imo Weatherspoon, but only if you play jobs with light damage WSs like Seraph Blade, Trueflight or Primal Rend. I guess it also has a use for melee WHM if you are into it.