For raid, ill be using Thrumming Gossamer + Bottled Hurricane or Amalgam’s Seventh Spine depending if im lacking Mana on raid bosses.
I like Bottled Hurricane, the basic stat isnt interesting but the on-use is pretty decent. It charge from everything (riptide hots, tidal pool, queens decree, healing rain etc). Downside : you cant charge it with overheal. Not good at all for MM+ but OK for Raid.
I tried too Concave Reflecting Lens but its pretty inconsistant and the IA on the proc is just “random 3 more target”, it does not take care if its missing HP or not. It can be fantastic if he chains proc and group is low hp as it can no proc from a 2-3 min fight.