I've gone over why it's a fair trade in other threads already, but in short terms, optimal Healer DPS requires -both- healers to minimize their healing GCDs. Almost any oGCD resources they can apply to healing come first, even a 300 potency AoE heal. AST can single weave nearly on demand, and it and WHM both have limited windows where they can double weave, but usually they don't have a way to capitalize on it. Anywhere you can enable both of them to do in order to weave their cooldowns in takes priority over your cooldowns.
Let's take a look at what SCH brings:
- SCH, in exchange for its average personal DPS and weaker raw healing GCDs, has the strongest oGCD kit in the game currently, with a near monopoly on the best mitigation tools available to any healer.
- SCH is the only healer who can double-weave and still DPS while moving on demand irregardless of their position. This is why Ruin II hasn't been updated. And why I didn't include an update to it in my proposal. I'd only upgrade it if WHM and AST both got an equivalent to it.
- SCH is the only healer who can flex their healing resources into DPS on demand. Energy Drain enables them to maintain DPS while single weaving if they choose to use it. Miasma II makes it an actual DPS gain over straight Broil II spam, and allows them to single oGCD heal alongside it.
- SCH is the only healer who has access to oGCDs they can use without needing to weave either in with Ruin/Miasma II at all, and a free seperate GCD heal at no cost to them. The Fairies are almost overkill with the amount of value they provide on their own. For comparison's sake the WHM in an AST/WHM comp is guaranteed to use at least a seventh of their GCDs providing slightly weaker amounts of tank regen over the course of a fight. Which is why that healing pair barely exists. Hell, Whispering Dawn is seeing use as a tank regen. In Savage. The only way to address some of the extra value the fairies provide is to trim down some of SCH's other raw power. Indom and the excess Aetherflow they get in fights already are the primary culprits for this, and given both fairies have a near-monopoly on SCH's single target healing output, it would be fair to take away from a bit of that too to mitigate the AoE loss.
Now let's address each of my proposals:
- Overflow will allow you to bank Aetherflow and flex up to 12 stacks (factoring in Dissipation and an all but guaranteed aetherflow refresh) within 9GCDs (about 22s without any clipping factored in). This can be done in the opener, or at any time within a fight provided you're able to wait a minute for a natural Aetherflow refresh before spending anything. In more realistic terms it lets you flex your initial 3 aetherflow that you'd normally spend immediately anywhere you want in a fight bare minimum, and lets you consistently use Dissipation for extra value in jump phases with minimal loss. Do not underestimate this. Flexibility has more power than people give it credit for.
- The wording on Focus is very specific. It's 100% Crit Rate, without the single target clause that MCH has on Dismantle. This means you guarantee a Crit-Succor on your entire party or Crit-Adlo, both of which can be deployed (Succor requires you to use the Fairy, and is only realistically useful for back to back AoEs the same way PI was before the buff). This gives 45% more healing + Shield potency, the latter of which would be doubled in the case of the current Adlo, giving you an effective 870 potency shield on one target, which could be spread. The reason I removed Critlo is because that gives you a reliable way to basically double your party's effective HP, before factoring in healing bonuses such as Largesse/Mantra and so on. That's how good it is. No other healer could come close to competing with that. It has to be removed because of the kind of cheese that enables would all but kill AST/WHM. And even if you don't need it on a heal, at worst it's almost equivalent to a free Energy Drain in damage when used on Bio II (100% crit rate snapshots onto every tick), and that can still be spread via Bane when applicable.
- Fey Cradle is affected by pet potency, which puts it at 75% of what I stated, making it's '450 Potency' into 337.5 player potency in practice. Yes it will see use, but not more than Indom. In order to use it at all you need to spend 5 aetherflow to access it, and it comes at the cost of 862.5 HoT potency from Fey Union [(480 - 250 from Embraces you would've had access to) x 5 Ticks x 0.75 Pet Potency = 862.5 over 15s], which gives it some realistic tension. It will certainly see use because it's worth it, but the reason I added it at all was to help bridge the gap between Eos and Selene in terms of AoE healing. Realistically you won't be able to use it on cooldown either, due to not having enough aetherflow to spend in the first place, particularly if you plan to take advantage of Overflow. You'd actually have to use Dissipation on cooldown and save the Aetherflow you gain from it till after the Fairy lockout window was over to even use it once per minute. In practice, you'll average out to using it once every 70-75s, with some wiggle room on where it lands. It's fairer than it seems on the surface.
- Fey Covenant's changes actually make it 20% magic damage reduction across all party members. I don't know if you know this but the 20% MDEF boost works the same way Foresight did in Heavensward, actually granting about 6-10% damage reduction to everyone in practice. I moved it over to Selene because it makes more sense for a 'Support' style pet and she needs it more than Eos does. The AoE Esuna on Fey Caress is just as useless on Eos but having one useless ability helps when you want to break a Fey Union tether without having to weave it in manually, which is a minor buff to Eos. Selene will be better in instances with known back to back AoE healing that Covenant can help mitigate while Eos will retain her universally applicable 'healer pet' niche with minimal losses.
- As for Indom, please read the cooldown again. That turns it into an AoE Lustrate. That means you can use it back to back easily. Indom's short cooldown will let you use two in one GCD with some moderate clipping that's almost equal to equivalent to a swiftcast after a full-cast GCD in most cases. It hurts, but not as much as you think. You'd do it instead of making the WHM use Cure III for sure, and with Overflow letting you stockpile Aetherflow for the big AoEs, the hit will be marginal. You can avoid needing to clip at all sometimes with Fey Cradle while still weaving in an ED if you want to. You just wouldn't be able to rely on a single Indom, but you can adjust its use based on what your co-healer is able to provide alongside it.
- Putrefy replacing Miasma II is purely a nerf. Intentionally so. Ruin II is good already, and this intentionally makes it the better DPS spell to use without specific planning. Of all the changes I've suggested, this is the most contentious one, but it's necessary imo. ED + Ruin II is already a DPS gain over Broil II. Miasma II actively makes you want to use ED. My other changes alongside this make it more of a cost to do so, and there should be a cost to weaving. SCH has plenty of advantages over the other two healers that enable them to almost purely DPS as it is. A DPS hit isn't going to kill them given how powerful they are already.