Many positive guys I know swear by these supplements. The evidence and the basic ideas behind them still leave a lot to be desired. This agent has a lot of promise but little that is known. Indeed, the major interest of pharmaceutical companies in DHEA and its analogues is for weight loss and insulin-sensitizing effects, certainly not for weight gain and muscle accrual.
Some people believe that it provides energy and strength.
Also, the idea that this is an oral testosterone is quite wrong. So I don't want to say that it couldn't help you in any way, but that it hasn't yet been proven to do much that would help someone like you. Carnitine has even less proof. Carnitine helps transport fats in. Adding supplements therefore would not provide any benefit.