Yet Another WHM Rework Idea

It's free to daydream.

Healing Spells
Cure - Single target heal. Upgrades to CureII
Aquaveil - AOE damage mitigation
Stoneskin - AOE shield
Regen - Single target HOT
Medica - AOE HOT. Upgrades to MedicaII, MedicaIII
CureIII - AOE heal around target
Raise - Rez
Afflatus Solace - 0 MP Instant Cast Single Target heal. Same potency as CureII. Feeds the blood lily
Afflatus Rapture - 0 MP Instant Cast AOE heal around self. Not as powerful as CureIII. Feeds the blood lily
* All but Afflatus Solace/Rapture grant a stack of Sacred Sight if Freecure is active. Freecure will also reduce MP cost of each to 0

Attack Spells
Stone - Single target nuke. Upgrades to StoneII, StoneIII, StoneIV, High Stone. Has a chance to proc Freecure
Aero - Single target dot. Upgrades to AeroII, AeroIII, High Aero. Becomes an AOE starting AeroIII. Has a chance to proc Freecure
Water - Instant cast AOE damaging spell with a cooldown. Same potency as Stone with falloff. Starts with 1 use, but later gains 3 charges. Upgrades to WaterII, WaterIII, WaterIV, High Water. Has a chance to proc Freecure
Banish - AOE targeted nuke with falloff damage. Requires Sacred Sight to use. Double hits the target with potency matching Stone. Upgrades to BanishIII, Dia, Glare, GlareIII, GlareIV
Holy - Point blank AOE damaging spell with stun effect. Grants Freecure
Afflatus Misery - AOE damaging spell with falloff, requires a blood lily in full bloom. Does higher damage than 4 hits of the current level of Stone. Has a recast timer of 20s. Later learns trait that increases blood lily cap to 2 flowers

Abilities
Thin Air - Grants Freecure and makes the next cast instant. Starts as 2 charges, increases to 3 in the lv60s.
Assize - AOE heal + damage with MP recovery.
Seraph Strike - Shares recast with Assize. Gap closer with same MP recovery, heal radius, and potency as Assize, but much smaller damage radius.
Prescence of Mind - Reduces spell cast time and recast time for 20s. Gains a trait in the lv70s that adds 3 stacks of Sacred Sight upon use.
Plenary Indulgence - Boosts healing potency of all spells for a time. Grants Freecure
Benediction - Restores all of a target's HP. Recast shortens to 120s in lv80 range.
Aetherial Shift - 15y dash forward

Notes
* Freecure is the main mechanic here. Proper usage should allow little to no DPS loss from healing without the need for too many healing abilities, while MP costs of healing spells should be relatively high to discourage spamming heals
* Lilies function as resources for mobility and are always a gain to use. Best to not overcap, like polygot
* I feel Tetragrammaton/Asylum/Temperance/Liturgy/Caress shouldn't be necessary under this design, but I'm not sure on it

How many Freecure stacks would you allow for?

That I straight up don't know. It'd depend on the proc rate and how much it'd actually be needed.

Honestly I think it'd be even fine if freecure was a trait and all healing spells just granted a stack of Sacred Sight unconditionally

I do agree with the idea of having all heals grant Sacred Sight unconditionally, in the average run I doubt you'd get too many these days, I'm just a little concerned about those really bad times when a tank doesn't tank. It could be neat to have a healing mechanic with SS, maybe two, I'm thinking maybe a 10% increase to healing potency per stack and a big AoE heal+mit spell you can use a token on so that those tokens remain useful, even when you're locked into heal spam through no fault of your own.

Not a big WHM player but this seems good.
Promotes damage dealing to new healers and gives current whm players more of a reason to use heals outside of lily heals and of course varied damage buttons.