GCD healing:
As already stated, Addlo could be given a damage reflection element to it. It wouldn't build up the Fairy Gauge and is merely a means of refunding the DPS lost from missing a Broil cast but with the added benefit of Broil granting Fairy Gauge, would that be enough? You're still healing the target so it's not as though you're losing Healing or DPS but it is limiting the Fairy Gauge from building so how to rectify that is still something I have to work on. I don't want to pull a Toxicon when Addlo breaks but making Ruin 2 turn into Ruination that matches the potency of Broil but offers 10 gauge instead of 5 when Addlo breaks is an option I've been considering.
Succor could be used for both healing and to refresh/extend SCH's DoTs. Since DoTs do help to build the gauge, being able to refreshing them wouldn't have the same problems as Addlo does and since Healer DoTs only cost 400 MP now, the true cost of the ability comes down to 200 mp as you save 800 from not having to recast Bio and Miasma.
Physick I am at a loss. Upgrading it to Addlo at level 30 is an obvious solution but then there's also the option of just making every healer's Cure 1 equivalent skill have an Esuna effect added to them. You remove 1 skill either way so they both work.
DPS:
Broil and Ruin 2 now offer 5 Fairy Gauge. I'm not 100% on the Ruination thing for Ruin 2 but that's still an option.
Miasma returns and stacks with Bio with both having a 50% proc to grant 5 gauge per tic.
Shadowflare returns as an oGCD DoT that lasts 15s on a 60s CD but instead of a Slow effect, it grants the Protraction effect to any ally that enters the Dome for 10s. This way, it can remain useful for all content since most bosses are immune to the Slow effect and it would normally be centered on the Tank since that's where the enemies generally are so that they can still receive the benefits of Protraction.
Art of War gains the effect of spreading DoTs but to keep the Fairy Gauge from overcapping, only the initial target of the DoTs count towards the Gauge generation.
Bane is added as a 15s DoT on a 60s CD that doesn't build Fairy Gauge but turns the ability into Fester. Using Fester causes Bane's DoT to expire but reduces the damage the Target does by 5% for the remaining duration of Bane's DoT timer upon use.
Aetherflow: I am honestly completely stumped here.
Indom is in contention with Fey Blessing and Succor now so would we really need it? Either Indom or Blessing would need to go but I'm more invested in keeping Blessing than Indom since otherwise it becomes harder to balance the Fairy Gauge unless I add a new Fairy Ability, which defeats the purpose of reducing the over abundance of oGCD healing tools.
The can of worms that is Energy Drain is also something that I can't really think of what to do with. SCH should have plenty of DPS tools now that it wouldn't really need it and if we're reducing oGCD healing tools, we might need to use more Aetherflow abilities more often.
Sacred Soil, Excog and Lustrate are fine as is.
Fairies:
Eos
Whispering Dawn now lasts for 15s with a cure potency of 120. 60s CD remains unchanged.
Fey Blessing CD reduced to 30s
Fey Illumination now provides a 15% Healing buff with 8% mitigation on a 60s CD
Selene
Whispering Dawn now lasts for 24s with a cure potency of 75. 60s CD remains unchanged.
Fey Blessing CD reduced to 30s. Provides a 380 potency Shield instead of a heal.
Fey Covenant provides a 15% mitigation effect with a 8% Healing Buff on a 60s CD.
Fairy Gauge:
Starts off at 100 upon entering an instance.
Whispering Dawn, Fey Blessing and Fey Covenant/Illumination cost 25 gauge.
Aetherpact costs 50 gauge and summons your unused fairy to the target to provide healing for 15s. This way you can use your other fairy skills without needing to worry about the tether turning off.
Seraph costs 50 gauge but Angel's Whisper, Consolation and Seraph Illumination can be cast without cost.
Misc:
Dissipation no longer dispels your fairy nor grants Aetherflow but instead allows the use of 1 fairy ability with no cost.
Alternatively, Dissipation and Recitation could be reworked to allow 1 free Aetherflow or Fairy ability usage with 2 charges, Recitation just allowing the skill to Crit over Dissipation.
Expendant is also something I hesitate to touch since it's still useful, even after the nerf but with the buff to Covenant/Illumination, do we need it?