Ime the alcohol always overrode the "good" feeling of opiates. Benzos will kinda potienate the opiates, but too much and you'll just fall asleep. Best combo I used was opiates, benzos,& soma. But its hard to find some these days. Drs switched to flexeril and zanaflex.
Bad news though far as addiction goes. Last thing you want is to be addicted to opiates NEEDING to take a dose 1st thing in the morning just to "get well".(i.e. get yourself "not dope sick"). Before long percs or oxys or opana supplies will run low or get too expensive and you'll rationalize heroin because its cheaper and stronger... Before long you'll spend $78k in a year n a half on it like I did... And end up in a $60k rehab with a $6k co-pay. Never ends well. Since I got out of that rehab spring '16, I've known of well over a dozen people who've od'd and died by usingbopiates with benzos in their systems.
Oh btw, most people who is and die from opiates, dontbdie just from opiate od... Almost always because they mixxed benzos and/or alcohol with the opiate.