When Fëanáro is feeling sociable she hangs out with him. He finishes his novel. (In it, the school turns him over to social workers and adopt him out, he escapes his foster family, he encounters a dragon and talks his way past it with stories about Arda, he studies wizardry and is unreasonably effective at it, when the dragon opens a portal to Arda he sneaks through too and the Valar slay the dragon, he fixes his mother with magic, and then he masters planar travel himself and conquers Bella's plane.) He finishes his typewriter, too; Bella's of the opinion that it would have been easier if he made vowels separate instead of consonant-hats, but it works okay like so. She acquires one when there is more than one, and learns to type, because crystal balls are a long time coming.
She has made some progress, though. She finds the common thread in dud combinations that produced an aura, and successfully decomposes all her original spells into pieces and begins to make new combinations. Most of these are trivial like the increased character limit arcane mark. Reverse-engineering her undead-damaging spell, though, gets her (small) arcane healing well in advance of when she was expecting to have that down. So anybody who lives on her block and cuts themselves cooking breakfast can knock on her door - or that of anybody who's getting the spells as she turns them out - and get that seen to without bothering a Maia.
Once a month she sees Miriel. Bella doesn't have any ideas that land any better than "forget you forgot something". But forgetting the contents of that foolish, foolish oath is at least a holding pattern that lets Miriel pretty much live her life, so, therapeutic success? ...Bella makes sure to remind Fëanáro that he is very adorable and lovable and adored and loved.
Well, she's not sure what else to try on Fëanáro's teaching style. It is hardly the worst teaching style she has ever met.
And much as he hopes to mature by brute intellectual force she is not yet convinced that this can be the only ingredient in his entire adulthood.
Great! Bella likes to start off class sessions by finding out what everybody wants to learn to do.
It's probably that they sleep less. She mentions the tradeoffs involved and doesn't otherwise interfere; you can get a ways on a few low-powered spells per day for a while.
She can understand that. She is pretty sure if anybody figures out a way to recharge mana without being bored or asleep Fëanáro will declare a festival for them.
In the meantime, she can figure out how to siphon mana off people who aren't using it. Nobody who doesn't practice has much, but it's still something.
That could be. Do Maiar sleep or do anything like it, though? Maybe they're large but finite supplies.
It could happen. Maybe he can siphon off some Maia who likes magic less at that time.