Methacodone Damn bro, I love your style, you dose exactly what I would given the choice. Just curious, you drinkin the Methadone and then shooting the other opiates, or do you have methadone pills you take throughout the day? I've found that around 20-40mg methadone will actually boost up an IV shot of Heroin, rather than block it, anyways, what are your ROA's and how do you stack the drugs, obviously you aren't dosing it all in one swallow?
Ignio I'm not suggesting you pick up the needle if you haven't already, but the tried and true way to use cocaine with opiates is the classic American speedball. Everybody prefers a different ratio, for me I like about 20% cocaine and 80% heroin (or comparable opiate you can safely inject). You cook the heroin shot like normal, then sprinkle the cocaine over the cooked heroin, mix it up, suck it up, shoot it up, and you're rockin amigo. People also do things called goofballs, which you shoot up a combo of Crystal Meth with Heroin or Hydromorphone or something. The speedball is more intense, you get that crazy coke rush, and then the cocaine's affects gradually fade away and you are left with a perfect Heroin high. But don't think you need a needle for speedballin, some would around if it's not Heroin and Cocaine in the same rig it isn't a speedball, but I say poo to that. You could totally achieve speedball like effects (sans rush) by shooting some of your morphine and then sniffing the coke if the IV rush is too intense for you. You could get opiated the hell out and then smoke crack, that falls under the speedball sub-category to me. Hell, taking some methadone, doing a shot of crystal and poppin some bars or kpins is speedball or "goofball" enough for me.
Anyways, to stop rambling and sum up. If your stimulants are overpower your opiates you are either taking too many stimulants or not enough opiates. It's all about the ratio dude. With cocaine I go about 25-30% to 70-70% opiates, that's my perfect ratio. For crystal, I use a different ratio. More like 10-15% Crystal Meth to 85-90% of whatever opiate you have at hand (and 15% speed is defo all I need for a nice goofball, sometimes it's even too much). Hope that helped. I'm not familiar with that one opiate you named, I haven't tried any of these new Opiates (that I know of).
Gonna go cook some soyrizo (soy chorizo, and it's actually bomb, tastes fantastic, with a great texture), maybe an egg and some toasted bread product. Peace all.