[X] As much as you hate to say it, this is something that they should actually speak to your mother about. You could theoretically whip some stuff up to help, but that's relying on you and your very sparse time. You can and will make time for family, but that might not be the best path. Charity has been dealing with this her whole life. She picked up a weapon and tried to rescue you when it came time. She might not have the answers, but she at least has experience in it.
[X] Assure Lydia that it'll be OK
-[X] Stunt: Life's never without risk. He knows more than most of what he's getting into. He's definitely old enough to choose for himself.
[x] If the problem is power maybe you could make some stuff for Daniel eventually, they'll probably help Izzy and Alec in an emergency as well
-[X] And maybe see if some coaching can help? Mom might be mad, but it would be better if he has help training, than doing so with just books.
[X] Training Montage? -[X] Assure Lydia that it'll be OK -[X] Convince Daniel, using whatever excellencies deemed necessary, that he is nowhere near ready to wade in supernatural waters so to speak. If he wants that to change, he needs to hone his mind and body for years before he can hope to survive as more than a hapless bystander. If he's willing to make that commitment in time and effort, we will assist him as we are able.