It wouldn't be my business but if he is unstable and not in his right mind and is willing to take advantage of others, me, my friends, loved ones or family, it is my business. I know for certain his path is the wrong one. For one thing it hasn't helped him. It's given him small boosts but due to negative karma he ends up falling on his face, but he doesn't believe in karma, so he ends up repeating the same mistake. That and what kind of good path endorses trying to get women to have sex with you by wearing a cologne or perhaps having them drink the liquid to make them horny, and what kind of good path encourages scamming people out of money. That and he has also studied psychology which allows him to use his magic to more easily manipulate others. I think I know my brother a little bit more than you though. I can tell he regrets some actions but he's not in his right mind and is corrupted by whatever he's practicing. Following a good moral path would not seriously disturb his mind.