Passionflower is great and all you need. Some people like caapi leaf instead. Either can be used as is and work well for potentiating DMT.
With passionflower, there are two kinds that I noticed which are commonly available. One contains a ton of twigs. The other is mostly leaf. The one with a lot of twigs should be avoided. It makes a very harsh smoke and is much less effective.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.
If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.