Just for fun, I'll input.
I think scholar getting back Energy Drain, was a poor design choice, at least in its current form. SMN has already changed the identity of Energy Drain, so it really shouldn't have came back with the same name at least.
Scholar, I would allow them the flexibility of getting back unused MP, but honestly choosing between damage and healing is always just going to create a large skill gap for players who don't understand when and what to use stacks on. The bully SCH who only ED's and the Overhealer. I would instead just make it DPS neutral and make it a skill that adds options for recovery and planned OGCD healing use, but doesn't directly add to DPS.
Tactical Conversion:
While having Aetherflow stacks, Tactical Conversion becomes Fey Rouse. While not under the effect of Aetherflow, Tactical Conversion becomes Fey Covenant Cool down of 30 seconds.
Fey Rouse:
This action cannot be assigned to the hotbar. Can only be used under the effect of Aetherflow.
Cost: 1 Aetherflow.
Grants your fairy 10 Fairy Gauge. Increases embraces potency by 40% for 20 seconds. [Will actually give it 20 fairy gauge, because of its Aetherflow cost.]
Fey Covenant:
This action cannot be assigned to the hotbar. Can only be used while not under the effect of Aetherflow.
Cost: 30 Fairy Gauge.
Grants you 1 stack of Aetherflow. Restores MP by 5%
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For WHM, I would just redo Fluid Aura as a buff. Use it as a sort of short term Lightspeed at the cost of a Lilly on the OGCD.
Fluid Aura:
Spells have their cast times reduced by 50% for 6 seconds. Consumes one Lilly. Ability Cool Down 15 seconds.
This would give you a sort of Malefic cast time to weave you other OGCDs, while allowing you to generate Bloody Lilly growth, without careless healing. [If 50% is too powerful because of Raise, it can just flat reduced cast times by 1 second. It affects cast times, not recast times, so its similar to Lightspeed and not PoM.
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In my opinion, healers should not have to choose between spending their main healing resources on healing and the other on DPS. [Assize is one of those skills that you get to have your cake and eat it too. So it still fits this rule even if its only healing the tank.] Gauge dump skills should complement their healing playstyle and let them heal more efficiently, opening more pathways to DPS.