In HW, it was the popular opinion that SCH was OP. It had MP efficiency to spare with Aetherflow returning 20% of its max MP a minute. Adloqium was cheap enough to spam to fish for a Crit. Adding a Warrior and Fey's Illumination (and Dissipation if you really wanted a big number), would turn that foretold Critical Adloqium into a mechanic-ignoring monster. Indomitability was a good, "free" heal to use (it's not all that free since it uses a stack of Aetherflow which is in direct competition for use on Energy Drain, among other things). Emergency Tactics turned Succor and Aldo into straight heals. Dissipation was garbage, but no one cared since everything else was so good. SCH was largely considered one of the two perfectly crafted Jobs with the other being WAR.
So, what happened in the transition between 3.45 and 4.0?
Well, to be frank, not only did SCH get hit with a lot of nerfs, but the game itself changed around the SCH that made its strong points less strong. SCH's MP efficiency got cut in half with Aetherflow now only restoring 10% MP each time its pressed instead of 20%, and one more Aetherflow action was added. Now, you would think that adding one more action wouldn't hurt, but this is also adding to the fact that Adloquium and Succor, two of SCH's trademark spells, had their MP costs skyrocket. At lv70, SCH's Adloquium costs 1800 MP that grants a 300 heal with a shield equal to the heal (so an essential 600 potency), unless that heal is a crit in which case it equals twice of the heal (so 900 potency). WHM's Cure II costs 1400 for a potency of 700 flat (with an added chance that Cure I will make Cure II free). Succor is in a similar boat, only Succor doesn't even have the added crit bonus that Adloquium has. In addition, the fairies Embrace potency was reduced from 300 to 250, however, since this a pet action, the actual potency is around 170. WHM regen heals for 150 consistently on a target whereas the fairies must cast their Embrace on a target, and it won't always be the tank. When we compare it to the AST, it gets worse. AST's Benefic II is 1080 MP at 650+10% or 15% depending on Sect with a chance at a guaranteed crit granted by Benefic I. However, AST also has a skill known as Aspected Benefic, which is supposed to be the spell that's akin to Adloquium since its effect changes depending on the Sect. Well, Noct Sect grants the barriers, which also grants a +15% heal bonus on top. Noct Aspected Benefic has a base heal of 200, so, really, 200+15%, or 230 potency, for a cost of 1440 MP. Okay, fair enough. But, in addition, the shield has a flat potency of 250% of the heal. No crit needed. So, in most situations, the AST shields are stronger than a SCHs shields. Granted, AST does not have any passive healing like the SCH does in the fairy, but SCH's shields are balanced around the idea that you are going to Crit and double the shield potency instead of you might Crit and double the shield potency. In addition, Succor's MP value seems to be balanced around the idea that you will get the free Succor from using Sacred Soil, but, to be frank, that Aetherflow stack used on Sacred Soil would have been better spent on Indomitability. More often than not, AST's shields are just better and cheaper than the SCH's. Why did they decide that SCH's MP efficiency should go down while MP costs should go up with their essential healing being so much less than their competition?
Because of this, I am of the opinion that SCH is lacking a real identity at the moment. Other problems, aside from the high cost and low efficiency of their GCD heals, SCH's fairies are heavily imbalanced (Eos is vastly superior to Selene, and Selene's support is incredibly weak), SCH seems heavily balanced around the idea that they will have a co-healer (so much stronger in 8 man content than in 4 man content), and SCH is heavily reliant on having their oGCD heals available (which means that they are off cooldown and SCH has the Aetherflow to spend, which means death is very punishing for them).
So, my proposed changes for the SCH are thus:
1) Changes to Adloquium and Succor: These two skills lose their shield aspects and become straight heals, similar to Cure II and Medica. They will gain extra effects depending on abilities as explained in depth at a later point. Adloquium potency is set at 600. Succor’s potency is set at 300.
2) Changes to Sacred Soil: Sacred Soil no longer costs Aetherflow. Sacred Soil’s radius is reduced to 25y. Sacred Soil becomes an ability that does 50 damage to all enemies who are inside for as long as the spell persists. The spell lasts 15s (basically, it’s Shadow Flare for SCH). (Shadow Flare will be removed from the SCH’s kit and be SMN exclusive) Sacred Soil will also be affected by abilities described at length in a later point.
3) Changes to Deployment Tactics and Emergency Tactics: Deployment and Emergency Tactics’ cooldowns are changed to 60s and share a cooldown timer. In addition, each time an Embrace cast has a crit, the cooldown of Deployment and Emergency is reduced by 5s. Deployment Tactics turns the next Adlo, Succor, and Sacred Soil to a shield. Emergency Tactics changes those skills to regens. For each spell specifically, the following happens:
Adloquium: Emergency Tactics effect reduces MP cost by 30%, heal potency by 70%, and a regen effect is then also applied to the target (110 potency; duration 21s), but if the initial heal has a crit, the Regen potency is doubled. Deployment Tactics effect increases MP cost by 30%, reduces heal potency by 50%, adds a shield effect that protects for the amount healed, but if the initial heal has a crit, the shield’s strength is doubled.
Succor: Emergency Tactics effect increases MP cost by 30%, reduces heal potency by 40%, and adds a regen effect (35 potency; duration 30s), but if the initial heal on a player is a crit, the regen potency is doubled. Deployment Tactics effect increases MP cost by 30%, reduces heal potency by 50%, adds shield effect that protects for the amount healed, but if the initial heal on a player is a crit, the shield’s strength on that player is doubled.
Sacred Soil: Emergency Tactics effect: creates a veil of healing magicks that recovers HP of all who enter (potency 85). Deployment Tactics effect: Erects a magicked barrier that reduces the damage taken by all allies in the barrier by 15%.
With these above changes, SCH becomes a flexible healer, having both shields and regens available (and at the same time if some fancy plays are made), though not as good at either as the other two.
For the Fairies:
1) The Fairy gauge is used as a resource for the fairy cooldowns: Since a lot of the fairy cooldowns are things a SCH wants to have constant access to, turning the fairy gauge into a resource gauge, kind of like Kenki, helps with this. Aetherflow actions will still add 10 points, but each cast of fairy Embrace will add 5 points. The Fairy gauge is a trait granted at lv30 (meaning fairy skills other than Embrace are locked in low level content).
2) Fairies (and Summons in general) no longer cost MP and do not have cast times. Instead, they behave like MCH's turrets and are placed in battle, but they do still have their own cooldowns. This makes death of the player and death of the pets less punishing. (I would also like it if they didn't cause face pulls like MCH's turrets do currently). If not (and it's unlikely since it would require quite a bit of reprogramming), then the costs of Summonining needs to be reduced to fit into the amount of MP given on revival with a bit more wiggle room.
3) Changes to Eos: Whispering Dawn is brought in at lv20 instead of lv4. Instead, a single target regen, called Rising Sun, will be at lv4 (so, really, at lv30 due to the fairy gauge changes). The new Lv 40 skill will be called Sunburst which will heal the target for 25% of their total HP (the original Lustrate). Whispering Dawn costs 40 Fairy points. Rising Sun costs 20 Fairy points. Sunburst costs 50 Fairy Points.
4) Changes to Selene: Silent Dusk is instead learned at lv20. Effect is changed to: Reduces damage dealt on target by 10% and lasts for 10s (Effect is the same as AST’s former Disable to give SCH’s back their Virus, kinda-sorta). New lv4 Skill: Waxing Moon - puts a shield on the tank that protects them for 7% of their HP. Moondust, the new Lv40 skill, is an AoE spell that places shields on the party that shields for 5% of their total HP. Waxing Moon costs 20 Fairy Points. Moondust costs 40 Fairy points. Silent Dusk costs 50 Fairy points. (Edits made to lower the potency of shields due to shield stacking)
5) Dissipation: If the above changes to pets happen, then I would like to see Dissipation traded with SMN's Aetherpact/Devotion. If not, then the effect should lose the heal boost and Aetherflow bonus, have the cooldown reduced to 45s, and have the effect changed to "Dismisses the currently summoned pet and summons the other pet in its place."
6) Aetherpact (SCH)/Fey’s Union: Instead of its current effect, the pet instead tethers itself to its SCH. This enables the constant “Deployment” effect of Adlo/Succor/Sacred Soil if Selene is tethered and “Emergency” effect of those spells if Eos is tethered. The Fairy Gauge will drain by 10 for each Adloquium cast, 30 for each Succor cast, and 40 for each Sacred Soil cast while under this effect.
With these changes, the fairies are more defined with Eos as the “Regen” fairy and Selene as the “Shield” fairy. The fairy gauge is far more useful (and far more punishing for those who don’t control their pets). Aetherpact/Fey’s Union is less of a glorified regen (though it can give the SCH a constant regen cast). Dissipation is actually useful and easily opens up the ability to swap between fairies as needed without having to spend extra resources. Fey’s Union allows the SCH to more easily access the effects they need without having to worry about cooldowns, assuming they have the points to spend.
Other changes that don’t fit into the above
1) Chain Stratagem: Duration is increased to 20s. Effect can now be passed via Bane (not affected by potency falloff).
2) Excogitation: Effect activates if its threshold is met or if the effect expires.
TL;DR: These changes turn SCH into a very flexible healer, turning Adloquium, Succor, and Sacred Soil into spells that change their effects if Deployment Tactics or Emergency Tactics are used, and the fairies are redefined as Regen-focused (Eos) and Shield-focused (Selene).