Dissipation I did successfully use for 4 man wall to wall pulls. I use up my Aether on Excog, Sacred Soil, etc then use Dissipation like as if it is a second Aetherflow cooldown. I have used Recitation shields to start a pull, but I was thinking in my posts it should be after Dissipation for a healing buff to the shield. I think it just needs to extend the healing boost to oGCDs so the 3 bonus Lustrates (or Excogs with Ren's suggestion) are also buffed with the fairy still being there using Embrace.

For Summon Seraph, it is interesting to look at it as 2 free Succors. I wonder how many players would rather have the spell just do that directly? Rename it to Fey Union and have it change Adlo and Succor to Fey Adlo and Fey Succor temporarily with 2 charges. Since the current shield is an instant oGCD, these ones may need to be mana free instant oGCDs too just for the Fey forms. I think the only disadvantage is this may remove double shields with Succor + Seraph.