Currently using the Darmoon card at 850 and really liking it. For my second trinket I’ve gotten the Concave Reflecting Lens from Vault at 840 and the Mote of Santification from Halls at 845. The Lens seemed pretty underwhelming in my tests, usually doing about 3% or less of my healing with no control. The Mote has been really nice though. The passive mastery is huge, and if I get a solid use on 5 people it’ll do around 5% of my healing whenever I need a little push.
Obviously this is all subject to change in a raid setting, but so far the card and mote are my go-tos. Still hoping to pull the Gossamer next week though.