With Aetherflow removed, you would need to increase the CD of Aetherflow abilities but not so much so that it becomes detrimental to the Fairy Gauge system while also keeping them at least somewhat in line with other healers so as to not lower SCH's ability to heal adequately in high stress scenario. The most promising combination of these factors was 2 Lustrates on 30s CDs, 2 Sacred Soils on 60s, 1 Excog on 60s and 2 Indom on 60s, which is just AST's CD line up on steroids, even before accounting for fairy abilities. Any increase in CD or charge removals caused SCH to start to fall behind in its healing capabilities since I was working on an average uptime of 75% in terms of Broil/DoTs so as to give some wiggle room for less experienced SCHs. It worked the higher your uptime was but started to fall apart at lower increments and given prog can get messy at the drop of a dime, I didn't think it was wise to pursue it further.

As for changing Aetherflow into Addersgal, the problem stemmed more from the other adjustments to the job I had made, such as Succor and Addlo being more useful and Blessing, and Covenant being on shorter CDs. You could get several additional casts of Fairy Abilities in that could substitute for other Aetherflow abilities instead, when coupled with Succor or Addlo, that you could use Energy Drain unabated and that it would be optimal to do so over using any of your Aetherflow Heals, that theoretically, I could completely axe all of the other Aetherflow abilities almost entirely, which became the case when I moved the uptime threshold up from 75%. Between the extra DoTs of Miasma, Bane and Shadowflare, 3 Energy Drains a minute for 7 minutes rises SCHs DPS into Tank Levels, with an estimation puting it just between PLD and WAR in terms of damage, i.e. more than any of the other healers could get close to.

I couldn't make ED solely a sustain tool with no damage because locking sustain independent of healing would be disastrous for a healer and removing it entirely would just further homogenize SCH and SGE. I can't increase the CD on Fairy abilities since that causes Guage Overflow issues. I can't make Aetherflow abilities more lucrative because it defeats the point of making GCD heals more useful. Admittedly, it wouldn't be a problem if the Fairy Abilities and Gauge were left unchanged but creating the resource management mini game that is my suggested Fairy Guage is something that I would like to see become a thing, even if only to test the waters with and seeing if it could realistically work first before admitting defeat on it.