Quite easy, I've tried pretty much every way to vape, and by far the best way is around 20, 30, 40mg smoked through a dry bong (yes, dry) sprinkle on top of a FULL, not jam packed, but full conepiece of cigarrette tobacco, no cheap shitty brands is good. Use a jet lighter, but keep far away and turn flame up high, this way you just use the adequate heat coming quite far from the end of the actual flame.
Rip that shit in one almighty lung full and kick back and, woooooosh! That shit blows your head off for the first few.
This can be done with lovely sloppy, or hard, freebase also. Providing many many more lungfulls and slightly different effects (just as good, if not better in some ways, especially for the poor little lung fellas!)
I do smoke cigarrettes though, so keep in mind, this may not tickle everyones fancy! But well, well worth the intensity. NO other way of smoking provides such rushes once it's experienced, and I have tried every way possible...and then some!