With the stormblood changes, healer design is again a discussion point, so I'd like to bring up ideas for the 3 healers that I believe might work better.

SCH:
Please keep the current DoTs as they are.. aero should go.. just put DoT on ruin 2 instead as a trait.. done.. do we really need to cut a DoT button? Change miasma into bio 2 after using ruin 2.. that should do the trick.

SCH in it's current form works really well, and the new stuff just plays to it's strengths.. Balance issues are in that:
- AoE is too efficient.. that can be solved by capping the dot duration on bane (I don't like damage fall off at all), need to use more stacks to keep dots up.. We also need a new AoE filler.. with a potency of 60 instead of 50 ideally.. just give that a reasonably high MP cost.. that should fix those issues.
- Fairy is OP.. ok.. here I'd change some things: 1. Embrace should not be able to target the fairy itself. 2.. I actually have changes to other healers in mind to fix the rest.

WHM:
Ok, the lily system doesn't look that great.. encourage spamming cure 1/2 and doesn't seem to get much use in normal play.. I'd add that lilies would proc on every cure variant, and should auto-generate every 15s in combat.
- Each oGCD gets a cooldown reduction and consumes a lily.
- For each lily currently on, you get a 5% MP reduction on all spells.
Confession just doesn't look interesting.. so I'd like to change something, that would also help balancing against the fairy:
- Regen becomes a 5s cd oGCD, 75 potency with 21s duration. It can also stack 3 times for a total of 225 potency. Planetary Indulgence can then depend on the amount of regen stacks a player has.
- Add a 400 potency instant cure, I'll call that Cure IV, so you can weave regen with it.. MP cost higher than cure 1 of course.
- Keep stoneskin 2, make it a 90s cooldown oGCD. Stoneskin 1 can be gone.

This still follows the pure-healer design of WHM, but putting a stackable oGCD regen on WHM that after some build-up would match what the fairy can put out, allows for larger DPS uptime, since the lily mechanic would work with cure 4, and you can weave regen in it.. it allows for efficient healing, and synergy between the different actions you have. Stoneskin 2 will be WHM's way to mitigate for dangerous AoEs.

AST:
Diurnal sect becomes passive. Nocturnal Sect will then be a 20s cooldown ability that changes regen to a shield on aspected abilities.
- They also get a new skill to cash out existing HoTs for direct healing (that's time-magic, so totally fits the job).
Also don't merge combust 1 and 2 here.. weaving capability is important after all.

By getting rid of the sect concept, AST only has a single toolkit in every situation, which allows for easier balancing. It'll not have shields on demand as much as SCH, but their shields would be more powerful, and still very frequent compared to 90s cd on SS2 for WHM. It also doesn't have a free regen, however get a lot of burst potential by cashing out their regens.

These changes would also bring AST and WHM further apart in design, creating unique healing styles for each of the 3 healers.