[X][Dad] Half Truth. Emma has actively ended your friendship and you haven't had much luck making new friends at school and that's been rough. It's not worth bothering Alan about.
[X][Dad] The truth will set you free, quite literally in this place. If you tell him everything, you might be able to do homeschooling instead of actually going to school. After all, what use has the school has been? Also no matter what they seem to be getting worse and more serious, at some point they might stop "playing" and might actually end up killing you. Probably not on purpose, but hasn't Sophia pushed you down the stairs before? What's to stop her from pushing you off the railing one day on an "accident" and you "accidentally" breaking your neck? When your enemies escalate and you can do nothing, it's better just not to play. Take your ball and go home, stay safe learn more about mana, and get your GED. Let them "win" whatever meaningless victory they want. After all, you'll make everything better as soon as you figure this mana thing out.
[X][Mana] It seems we finally have the ingredients for a safe healing magic: Mix plant and blood so the red and green averages into brown, apply calcium carbonate to make it boring, let the stiffening of plant mana cancel out the softening and elasticity of graphite mana, and at the beginning of the chain you add a mix of copper and coal to give it a nudge towards being more like the body's own healing process over time.
[X][Mana] See if you can make a plant that instead of creating a lot of dust at once, uses sand-like mana to grind down the dirt or sand it grows on into dust in a slow trickle, make a second plant that uses this dust and it's own plant mana to create a larger amount of plant mana and then (using a plant-aluminum-plant mana chain probably) re-absorbs it to promote it's own growth, then finally use your plant meta symbiosis mana to make these become symbiotic with each other and form a stable feedback loop.
[X][Mana] Try mixing battery mana and paper mana for even more black-staining power, then do the Air Dust Transmutation chain with that mana to create an instant dense cloud you can use to conceal yourself. Try this somewhere OUTDOORS and for from anything you care about, NOT in your own home.
[X][Mana] Offensive magic: Thaum > Sand > Copper (Test again to try and create a disintegration beam with the Phenoms: Age/Destroy) ; Thaum > Bone > Zinc (might make a deathbolt); Thaum > Salt > Copper (Phenoms: Stop/Halt/Slow) ; Thaum > Glass > Eye > Mild Steel (Phenom: Blind, intended to block someone's eyes with light)
[X][Materials] Ask Dad to see if he can get you any basic elements (e.g. mercury, magnesium) you haven't tested yet, if he can subtly acquire them. Or go shopping on the Boardwalk for things like an old mercury thermometer, a magnesium firestarter and a helium balloon. A rock shop might have small samples of pure elements like sulfur, arsenic and bismuth.