I dont' get the point of the post. Is there a question here? If there is, the answer is - normal people don't mix cocaine and vicodin and xanax. They do cocaine first, have a lot of fun, then when they want to sleep, they pick either vicodin or xanax as their landing pad.
Doing them all at once is unnecessarily dangerous and I can't see it providing a euphoria worthy of risk. The vicodin and xanax would cancel out the cocaine and vice-versa.