Your a fuckin idiot mate, no offence. Your suggesting a highly habitual dependent way of being. I don't use opiates but it doesn't take einstein to work out that a relapse on opiates sounds highly unlikely, I haven't put in the hard yards with opiates so it's kind of hard to justify however the fact you couple benzos with the additional methamphetamine to take the edge of is stupid at best. So you mean you to suggest you wish to use the "ice" first followed by a benzo to take the edge of, then tail end it with 6 hrs of an endorphin opiate release rush? That would be a far more substantial way of using those drugs safely with less side effects and nasty pastys.
The order in which you said each compound should be fairly noted as you probably mean well but saying that to a well educated user of all 3 substances he would clearly or imo most likey say the order i suggested with a hopefull "no replapse" at all. When you say relapse do you attribute this to the benzo's sounding the alarms telling you you need a benzo and quickly or do you attribute this solely to heroin itself and what entails heroin use overall?
I highly recommend using them in the order i suggested should you need all 3 anyway or better yet replace the methamphetamine with cocaine instead and less of it. Meth obviously leads to x ammount of days awake and the heroin is known to do that to some people as well however it seems to make me sick and want to lay down in search for sleep.
Any way enough ranting, stay safe man. lose either one of the 3 and just have 2 of them first to work out how they synergise first up but don't forget the order and duration in which you used them in, it will be handy info should you choose to use a 3rd alternative mixed in with the first 2. hint hint (forget about the benzo's) that;s the moral of the story
nobody needs benzos, if your going to be taking a downer/upper/stabilizer (not refering to mood) then you should really know what's ahead of you and except your reasons for searching for such drug combinations in the first place as all ok and all with in a mean neccasary that you can handle,
Becuase
if you are looking for escape then heroin is definantly a no go as over time it gets the better of your perception and as for the meth well if you believe too much into your thoughts and other peoples that will make you come unstuck pretty quick, just remember not to be paranoid as in forget about it. and the benzos well fuck em nobody needs them. modern day medicine trash.
Goodluck