Why use stims for fat loss, when you can use other healthier alternatives. After all, on the long run stims don't lead to effective fat loss, and they are not a healthy thing to use. For examply, you might as well consider Cardarine GW or SR9009 to stack with N2Slin.
In fact, N2Slin makes an amazing stack with Cardarine GW, and I have personally used this stack - the results were awesome.