Lol, I think you can take any benzo also with the SN as well. There is really no need to mess with Amitriptyline. I had once thought that it's the best method. But later I realized that I will have to be swallow 400 pills (100, If you have 100 mg form. But it's still too much) and if something goes wrong with the benzos, I will have to be feel the pain of the heart attack.
Also do you know that you need 8-12 hours to succesfully die by this method?