When I was really poor and using h (still am really poor actually) I pre-loaded on codeine before swinging the hammer and got some really good cheap nods, if you're still using h ash I recommend giving it a go, you might save yourself some coin. Pst works well too, you just have to be wary of the strength of the seeds. I recently got a batch of seeds that were noticably stronger than usual, same brand and everything. It felt like there was a much higher codeine content in them.
I used to do a cwe, drink it then rack up a point of h and they would kick in about the same time. I got way more mileage out of the h for how much i was spending, slightly different high but still good, it seemed to be more than a sum of it parts, the h seemed to quite distinctively change the way I perceived the codeine. I don't care for straight codeine at all and only cwe to chase away withdrawals but mixed with h it was great. I spilt a cup of codeine once too, woe woe woe. It was just before work in the mines and I didn't have time to make up another so had to ride out a day of withdrawals working underground in nearly 40 degree 100% humidity. Not the best day I've had, sheesh.