Got both the shield and ramuh ring for tanks recently.
I need to get the BRD ring, but it's so fucking dull and everything but the BRD ring drops for whatever reason.
As with everything else in this game, we had healer rings falling from the sky. Followed by a light drizzle of caster rings. I think we still want to go in to get one more tank ring? Or maybe the melee ring, can't remember I don't pay attention.