Picked Setting of the Ages, Gem of the King under the Mountain, and Rune of Ancient Light as current offerings are incredibly slim for healers who care about their ability to take a hit. It's always been standard practice for us to take the damage mitigation from Midnight Raid for our class LI, and the old relics actually had good choices for minstrels that gave us powerful healing and some mitigation.
Fast forward to the new system and everything designed for healing classes revolves exclusively around outgoing healing while decimating any and all mitigations we had under the old system. It doesn't matter how high you push your outgoing heals, never forget that a dead healer's healing output is still 0. Hence, my choices.