What I used to do is get pot and dope to save money, since smoking a bit of pot with opiates will allow you to take less opiates and get similar effects. Obly works if you don't go overboard with the we weed and fuck your tolerance.
Definitely, usually my standard dose to get off on opiates is 12 grams kratom and 60 mg oxycodone. That's just to feel euphoria, if I want to nod its going to take at least 80mg of oxy.
I find if I take 8 grams of kratom, and 40 mg of oxycodone, then smoke a bowl, then a cigarette right after, im in nod city. There are actually studies showing that weed increases opiate induced analgesia by up to 600%.
I do feel that weed kind of overpowers the opiate euphoria if you smoke too much, or have a low tolerance. In the same way that 2 beers will increase opiate euphoria, but any more will overpower it, weed is the same way.
So strange how opioids by far give the best high of any class of drug, but are also overpowered by seemingly weaker drugs.