Long time addict - wondering about getting the most outta weak dope and dope in general

So i want to start off by saying - daily addict of opiates goin on close to 5 years.. oxy/pills 2yrs+/dope 3yrs I know many different ways to get more out of my dope/opiates in general and ways to stretch and keep my tolerance lower. The main one for me has always been daily lifting/cardio. 20-30minutes lifting/compound excercises 6x a weekand 15-20minutes of cardio/10 of HIT cardio a day 7x a week sometimes twice a day. This allows endorphins to flow more naturally in the brain allowing me to either use less and get the same effect or use more and get even stronger a effect from my dope. It also is just a great way to relax and cope in general without relying on drugs.

What I mean is that although I rely on drug use daily i'm not blinded by the fact that i "have to have them to cope with a problem, or had a bad day, or tooth hurts, or couldn't sleep." shit like that where people justify using more or just there use in general. Working out/jogging allows me to sleep even when the dope is pathetic, even when lowering my use from .3-.4 a dy to .1-.2 a day. It is shitty tho when the dope gets bad and I have no energy - my lifting will suffer but I still get it done and cardio i just have to push my self further.

What are some good tips/hints you've picked up over the years to get higher off your dose or to stretch it out more in general? It seems when the dope is weak I have to wait ALOT longe rin between to get more out of it.. where as fire dope I can do more in a hr or 2 and get strong effects/ even higher but shitty dope it's like you plateau and just feel like your wasting dope at a point. Maybe that's just me tho? I'm very curious to hear all yalls opinions/ what have yall picked up over the years? Do you find spreading your dose out to 3-4 smaller doses throughout the day is more enjoyable or if you do 3-4 small doses do you think wiser to do those in 2 bigger doses and wait longer in between?

Also one thing i've NEVER understood.. say some fire dope is 60-70% pure.. but some shitty dope is 30-35% pure.. In theory you'd think doing TWICE of the shitty dope you'd get the same effects as the fire dope.. as in IF the fire dope say .1 of fire (70% pure dope)='d 100mg of oxy (just for some type of set increment of dose this is hypothetical) wouldn't you think .1 of 35% pure (weak) dope would equal 50mg of oxy? It seems to me when dope is weak it's just fucking weak.. doing double does not = the same effects what so ever. But why is this?

I feel like there is some math i'm missing and all "raw" is never pure 100% raw) but in general if you had 70% pure raw and a 35% batch of raw why is it that doing twice the weaker doesn't = the same? It's always boggled my mind that it just doesn't work like that.