Scholar wants for a clearly defined job identity. Its capstone abilities from each expansion feel disconnected or even antithetical to one another, and its lack of connection to the Scholars of titles past leaves it with little in the way of a unique flavor apart from "barriers" and "fairy". Part of this lack is due to its origin as a bifurcation of the Arcanist class, but now that Summoner has grown beyond its humble beginnings, there's little reason why Scholar can't do so as well.
Scholar's abilities should be built around its lore. Scholar is a battlefield tactician who has forged a partnership with an otherworldly arcane entity. Scholar's healing and damage are two sides of the same coin - restoring, stabilizing, and disrupting aether within the bodies of their targets. Scholar cedes Ruin to Summoner entirely and begins with Broil instead.
Instead of casting Summon Eos or Summon Selene, the Scholar casts Summon Fairy, which is in Dawn phase by default. This results in summoning Eos at level four.
Dancer's Closed Position and Curing Waltz abilities demonstrate that it is possible for an ability to be executed by the Scholar with its area centered on another entity, performed with no delay. The Scholar executes Whisper, and the fairy does nothing, but Whispering Dawn's area of effect is centered on the fairy. If this means sacrificing the fairy's Whispering Dawn cast animation, then so be it. In Dusk phase, Whisper executes Whispering Dusk.
Since abilities can now have a Scholar affinity without affecting Summoner, the Scholar gains Succor at level 10; if necessary, the Galvanize barrier can come later via a trait.
Scholar's basic mechanic can continue in the same vein as the original Aetherflow, but we can look to the series history to know that Scholar's archetypical ability is Libra. With Libra, the Scholar examines the battlefield and devises tactics on the fly. These tactical maneuvers are represented by the erstwhile Aetherflow charges, now Strategems. The Aetherflow Gauge is now the Strategem Gauge.
If Scholar must wait for a trait to add Galvanize to Succor, it comes when the Scholar learns Adloquium.
In lieu of Ruin II, Scholar now has Pain, which can now only be cast once every 30s. With the reduction in cast time for healing spells in Endwalker, the instant cast spell is less necessary for weaving. This allows Pain to have a higher potency and potentially to inflict a damage over time effect.
The Fairy Gauge is now unlocked along with Illuminate. Illuminate creates an area of effect around the fairy that grants Morning Illumination with a Fairy Gauge cost of 10. In the same way that Whisper now takes effect instantaneously, so does Illuminate. Extinguish ends the effect in the same way Dissolve Union ends Aetherpact. In Dusk phase, Illuminate executes Evening Illumination.
Lancet is a reimagining of Scholar's version of Energy Drain. Lancet is already a historical Final Fantasy series ability that does much the same thing, and it is also the name of a surgical implement - apropos for a Healer. Lancet also contributes twice as much to the Fairy Gauge as other Strategems. This adds some strategy to deciding whether to use a Strategem for healing in the short term or to contribute more to the Fairy Gauge for a long term investment.
Deployment Tactics, like Emergency Tactics, is now a buff applied to the Scholar, which extends the next Galvanize effect they apply with Adloquium. This results in the shields extending instantaneously upon taking effect.
In lieu of Dissipation, Scholar now has Coalescence, which can stack up to three charges. This grants an additional Stratagem to the Scholar by drawing energy from the fairy. This causes the fairy to enter Dusk phase and become Selene for 10 seconds per charge executed. While in Dusk phase, potencies for all fairy abilities are halved.
Bestow executes the effect of Fey Blessing, Fey Inspiration (in Dusk phase), or Consolation (in Day phase), centered on the fairy. Recast timer for Bestow resets when the fairy enters or exits Day phase and has a second charge while in Day phase.
Exalt causes the fairy to enter Day phase and become Seraph for 30s.
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Level Ability Type Cast Recast
1 Broil Spell 1.5s 2.5s
2 Bio Spell Instant 2.5s
3 Physick Spell 1.5s 2.5s
4 Summon Fairy Spell 2.5s 2.5s
10 Succor Spell 2s 2.5s
12 Resurrection Spell 8s 2.5s
15 Whisper Ability Instant 60s
26 Bio II Spell Instant 2.5s
30 Libra Ability Instant 60s
30 Lustrate Ability Instant 1s
35 Adloquium Spell 1.5s 2.5s
38 Pain Spell Instant 30s
40 Illuminate Ability Instant 3s
40 Extinguish Ability Instant 1s
45 Lancet Ability Instant 3s
46 Art of War Spell Instant 2.5s
50 Sacred Soil Ability Instant 30s
52 Indomitability Ability Instant 30s
54 Broil II Spell 1.5s 2.5s
56 Deployment Tactics Ability Instant 120s
58 Emergency Tactics Ability Instant 15s
60 Coalescence Ability Instant 10s
62 Excogitation Ability Instant 30s
64 Broil III Spell 1.5s 2.5s
66 Chain Strategem Ability Instant 120s
70 Aetherpact Ability Instant 3s
70 Dissolve Union Ability Instant 1s
72 Biolysis Spell Instant 2.5s
72 Broil IV Spell 1.5s 2.5s
74 Recitation Ability Instant 60s
76 Bestow Ability Instant 60s
80 Exalt Ability Instant 120s