(As this format comes from the template that I have used, and it is the template that they designed, I give full credit to jas [happy_ice_cream] from Guoba Certified's Discord community.)

Profile (Keywords)

Keywords of Luocha’s Novaflare: Comfy Healing, Comfy Utilities, Def-Shredding Sustain, Dewdrop Reincarnate, Healing Weaponized, The Bane of Demise-Seekers

Gameplay Notes (Changes and Additions)

Caution—This section is for those that seek the TL;DR of my ‘Luocha Novaflare.’ If you are still willing to thoroughly read and understand my ‘Luocha Novaflare,’ then feel free to take an appreciated journey.

= Skill’s: The Skill is now Blast Healing and does a debuff cleanse on the targeted ally. 

= Ultimate’s: If removing an unremovable buff, reduce its efficiency by 20% instead. If there are multiple unremovable buffs, 1 unremovable buff will be prioritized, and it will be the effect that increases DMG dealt. In gaining an Abyss Flower, Luocha also gains "Touched by the Divine," an effect that enhances the Zone. In being enhanced, the Zone does a 25% DEF decrease on enemies. 

= Talent’s: While the Zone is active, grants "Nether’s Florentina," an effect that can be charged up, to the team. An ally’s launched attack causes the "Nether’s Florentina" that they possess to rupture, dealing Additional Imaginary DMG to the attacked enemy based on Charge value, having a 100% fixed CRIT Rate and a 125% fixed CRIT DMG. After rupturing "Nether’s Florentina," 18% of the consumed Charge value is refunded. The following are the methods that all allies employ in charging up the "Nether’s Florentina" that is in their possession:
At the beginning of a turn, charges "Nether’s Florentina," with the Charge value being equal to 35% of Luocha’s ATK.
When HP is restored, charges "Nether’s Florentina," with the Charge value being equal to 25% of the amount of healing received from the Skill and/or the Zone’s effect. 
Luocha is able to gain and consume stacks of Abyss Flower while the Zone is active. Redeploying the Zone when it is already active refreshes its duration instead. 

= Major Traces’:
A2’s: At max, "Nether’s Florentina’s" DMG increase and Charging Efficiency are 225% and 165%, respectively. For every 3 instances that "Nether’s Florentina" ruptures, Luocha’s next action is advanced by 24%.

A4’s: The team gets a 25% Incoming Healing buff. 

A6’s: While the Zone is active, the team essentially gets an 80% Control RES buff.

= Eidolons’:
E1’s: "Nether’s Florentina’s" fixed CRIT DMG is now 150%. When healed by the Skill/Zone’s effect, if HP is at 50% or higher, the target/attacking ally, and all other allies if being healed by the Zone’s effect, get shielded. 

E2’s: Rupturing "Nether’s Florentina" results in further dealing 1 instance of Additional Imaginary DMG to the highest HP enemy. The following are included in the methods that all allies employ in charging up the "Nether’s Florentina" that is in their possession:
When losing HP, charges "Nether’s Florentina," with the Charge value being equal to 13% of the amount of HP loss. 
When receiving/losing the Shield provided by Skill/Zone’s effect, charges "Nether’s Florentina," with the Charge value being equal to 25%/13% of the amount of Shield that is received/lost. 

E4’s: While the Zone is active, at max, the team gets a 42% Max HP buff. 

E6’s: The Zone, through "Touched by the Divine’s" enhancement, also does a 30% All-Type RES reduce on enemies. 

Character Abilities

Values that change with Level are given at Level 1/10/12 (1/6/7 for Basic ATK). 

Basic ATK | Thorns of the Abyss

Single Target | Energy Regeneration 20 | Toughness Reduction 10 | SP +1

Deals Imaginary DMG equal to 50%/100%/110% of Luocha's ATK to a single enemy.

Skill | Prayer of Abyss Flower

Restore | Energy Regeneration 30 | Toughness Reduction N/A | SP -1 

After using his Skill, Luocha immediately restores the target ally's HP equal to 40%/60%/64% of Luocha's ATK plus 200/800/890 and removes 1 debuff(s), prioritizing Crowd Control debuff(s), that the ally is afflicted with. Additionally, adjacent allies’ HP is restored by an amount equal to 10%/30%/34% of Luocha's ATK plus 100/400/490. Meanwhile, Luocha gains 1 stack of Abyss Flower.
When any ally's HP percentage drops to 50% or lower, an effect equivalent to Luocha's Skill will immediately be triggered and applied to this ally for one time (without consuming Skill Points). 
This effect can be triggered again after 2 turn(s).

Ultimate | Death Wish

AoE | Energy Regeneration 5 | Energy Cost 100 | Toughness Reduction 20 

Removes 1 buff(s) from all enemies and deals all enemies Imaginary DMG equal to 120%/200%/216% of Luocha's ATK. If the buff is unremovable, then this effect’s efficiency is reduced by 20%, lasting for 3 turn(s). Only 1 unremovable buff(s) will be considered. If there are multiple unremovable buffs, then prioritize the effect that increases DMG dealt. At the same time, Luocha gains 1 stack of Abyss Flower and "Touched by the Divine." "Touched by the Divine" enhances the Zone, enabling the Zone to decrease all enemies' DEF by 25%. The enhancement lasts for 3 turn(s).

Talent | Cycle of Life

Restore | Energy Regeneration 0 | Toughness Reduction N/A 

When Abyss Flower reaches 2 stacks, Luocha consumes all stacks of Abyss Flower to deploy a Zone against the enemy.
When any enemy in the Zone is attacked by an ally, the attacking ally's HP is immediately restored by an amount equal to 12%/18%/19.2% of Luocha's ATK plus 60/240/267. 
While the Zone is active, grants "Nether’s Florentina," an effect that can be charged up, to all allies. An ally launching an attack causes the "Nether’s Florentina" that they possess to rupture, dealing Additional Imaginary DMG to the attacked enemy based on Charge value, with a fixed CRIT Rate for this damage set at 100% and fixed CRIT DMG set at 125%.
After rupturing "Nether’s Florentina," 18% of the consumed Charge value is refunded. 
Through the following methods, all allies charged up the "Nether’s Florentina" that is in their possession:
At the beginning of their turn, charges "Nether’s Florentina," with the Charge value being equal to 35% of Luocha’s ATK.
When their HP is restored, charges "Nether’s Florentina," with the Charge value being equal to 25% of the amount of healing received from the Skill and/or the Zone’s effect. 
The Zone's effect lasts for 2 turns. Luocha is able to gain and consume stack(s) of Abyss Flower while the Zone is active. Deploying the Zone when it is already active will refresh the Zone’s duration instead. When Luocha is knocked down, the Zone will be dispelled.

Technique | Mercy of a Fool

Restore | Energy Regeneration 0 | Toughness Reduction N/A 

After the Technique is used, the Talent will be immediately triggered at the start of the next battle.

Bonus Abilities (Traces)

A2 Bonus Ability | Cleansing Revival

Increases "Nether’s Florentina’s" DMG by 50% and Charging Efficiency by 130%. For every 500 of Luocha’s ATK, additionally increases "Nether’s Florentina’s" DMG by 25% and Charging Efficiency by 5%, up to a maximum increase of 175% and 35%, respectively. For every 3 instances that "Nether’s Florentina" ruptures, Luocha’s next action is advanced by 24%.

A4 Bonus Ability | Sanctified

Increase all allies’ Incoming Healing by 25%. When any enemy in the Zone is attacked by an ally, all allies (except the attacker) restore HP equal to 7% of Luocha's ATK plus 93.

A6 Bonus Ability | Through the Valley

All allies’ chance to resist Crowd Control debuffs increases by 60%. While the Zone is active, this effect is further boosted by an additional 20%. 

Stat Trace Totals

2x Trace: DEF (12.5%)

3x Trace: HP (18%)

5x Trace: ATK (28%)

Eidolons

Eidolon 1 | Ablution of the Quick

Increases "Nether’s Florentina’s" fixed CRIT DMG by 25%. When receiving HP restoration from the Skill/Zone’s effect, if HP is at 50% or higher, the target/attacking ally receives a Shield that can absorb DMG equal to 18% of Luocha's ATK plus 240. If it is from the Zone’s effect, all other allies additionally receive a Shield that can absorb DMG equal to 7% of Luocha's ATK plus 93. This effect lasts for 2 turns. 

Eidolon 2 | Bestowal From the Pure

When "Nether’s Florentina" ruptures, further deals 1 instance(s) of Additional Imaginary DMG to the target that has the highest HP among the hit targets. The following methods are included in the methods that all allies employ in charging up the "Nether’s Florentina" that is in their possession:
When losing HP, charges "Nether’s Florentina," with the Charge value being equal to 13% of the amount of HP loss. 
When receiving/losing the Shield provided by Skill/Zone’s effect, charges "Nether’s Florentina," with the Charge value being equal to 25%/13% of the amount of Shield that is received/lost. 

Eidolon 4 | Heavy Lies the Crown

When Luocha's Zone is active, for every 500 of Luocha’s ATK, additionally increases all allies’ Max HP by 6%, up to a maximum increase of 42%.

Eidolon 6 | Reunion With the Dust

In being enhanced by "Touched by the Divine," the Zone additionally reduces all enemies' All-Type RES by 30%.

Explanation and Conclusion

Luocha has always been the ‘Comfy Healing’ Healer, but these days, a Sustain should do more besides being ‘Comfy’; Sustains should either do buffing, provide utility, or, better yet, do a bit of both. Looking at Luocha’s kit, well, he only does an AoE enemy buff removal and is an ‘SP Factory.’ Yes, with the sets ‘Warrior Goddess of Sun and Thunder’ and ‘Broken Keel' and the LC ‘Multiplication’/‘Quid Pro Quo,’ Luocha can also give a buff and fine-tune the aforementioned utility/provide another utility. However, this is with a build already, and I do believe that Luocha is capable of doing more. 

Hence, I say that his healing should be weaponized; make him be Dewdrop Reincarnate. If he primarily heals and he heals superbly, why not weaponize his healing? In going with what was pitched, this Novaflare enabled Luocha to have his own Dewdrop that is named Nether’s Florentina. What separates Nether’s Florentina from Abundance’s, of Sim-U, Dewdrop is that it does not have a cap, it is ATK scaling, it has a refund mechanic, and it has a fixed CRIT ratio. Since one of Nether’s Florentina’s ways of being charged up is receiving a healing, the Skill becomes Blast-oriented, and the team gets an Incoming Healing buff. Additionally, the Skill finally does not need a major trace to debuff cleanse. 

Regarding the Ultimate’s buff removal, it is very much the ‘relative’ of pre-Novaflare Welt’s delay. This is because most enemies, especially the 'higher ranks,' have unremovable buffs. So, the Ultimate might as well only do insignificant damage. But this will not come into pass, for the renewed Ultimate will inflict a new debuff that will be known as (Unremovable) Buff Efficiency reduce. Speaking of buffs, in using the Ultimate, Luocha gains Touched by the Divine, a ‘Zone Enhancement’ effect that enables his Zone to do a DEF decrease on enemies. 

As for Luocha’s new utilities, he has a built-in self-action advance through his A2, which helps him quickly recover SP, and his talent has a Zone extension. As for the team, provided that the Zone is active, they basically get a Control RES buff through his A6. 

To conclude, Luocha jointly provides ‘Comfy’ Healing and Utilities to the team and ‘Uncomfy Damage,’ which becomes uncomfier, to the enemies. All in all, Luocha fulfilling his oath is definitely on the horizon.