hmmm, well changa is dmt infused herb, where the herb has MAOI in it. From the sounds of things you are just trying to melt DMT onto some herb, this is not changa. Check
here and
here for more info.
DMT is disolved in a solvent of choice(IPA, acetone) and some herb is added to it, then this is left to evap=enhanced leaf or changa.
If you go on with the method you are using, dont let the flame touch the DMT, that is just wasting the molecule, you need to just draw in the warm air from the flame, vaporising the DMT.
Breakthrough??hmmm, I dont think relating a breakthrough as beeing "more intense" is the right way to put it, a breakthrough will break all reality apart, wayyyy more than "more intense".
Correct your smoking method to get better effects.
Make some proper changa and smoke a small bowl of that, 10-15 mins later load up a bigger bowl and smoke that

, then report back.