Scholar doesn't have a single weakness. It can do everything if it wishes for it. Burst single-target healing? Yes. Most MP-efficient and fluid sustained single-target healing in the game? Check. AOE-healing? Sufficiently good now, as this game has very interval-based AOE-damage mechanics, meaning that Indomitability/normal Succor with a shield/pseudo-Medica-Emergency-Tactics-Succor are all readily available tools. And that is just assuming Selene is being used - if you add up Whispering Dawn and other Eos buffs there, well.. Yeah. Not to of course mention how ridiculously good Deployment Tactics is.
DPS-wise, SCH easily has the best sustained DPS for both single-target and AOE; this also being supplemented by how the SCH does its damage (the nature of their off-DPS and general Cleric Stance fluidity with their tools), as well as how Energy Drain doubledips as a MP-restoration skill, and how Aetherflow is generally superior, etc. etc., all of which contributes to the sustainability.
If you think about the SCH - can you think of even one thing where it sucks? Mitigation, pure heals, sustained heals, bursty heals, DPS, utility, MP-sustain etc.? I can't. Sure, you mostly have the SCH play out in a certain way in progression (as an off-DPSer with mostly mitigation and support heals at times), but SCH has an answer to everything should it wish for it.
