i've taken xanax with MDMA for this exact reason before. I wouldn't say that the benzo overpowers the MDMA, in fact you get just as high IME. It definitely takes away the anxiety post roll, the thing is though I have realized that afterwards I don't remember much of my roll (Xanax does this to me and others too I'm guessing lol). With Temezepam I would say it is not as strong and doesn't have that memory loss effect as much so I would say this may be a good idea. I have always had a great time mixing the two, I just don't remember much and I'm not sure if it is 'safe' to mix benzos with MDMA.