OP relics:
Hamster Wheel, Ringing soul, Ninjato.

UP relics:
Ring of Chaos (doesn't seem to work properly), Ring of Exchange, Ring of Fangs, Ring of Greed (unless you have Du-vu doll or similar).
In particular, I cannot think of any scenario, even with a freely constructed deck, where ring of fangs is worth picking up.

UP cards: corrosion curse, life bind, massacre, fluid movement, poison smokescreen, necrosis, anything with crystal orbs, claw rake, repulse, solid light projector.
Crystal orbs ought to benefit from focus, and have a more useful evoke.