Ethnobotanicals Kava Kava and dissociatives?

[SuperPsych]

Is there any reason to believe that this would be dangerous? My main concern is Kava's MAO-B inhibition. I don't know the dangers of MAO inhibition to understand any possible dangers. I imagine it'd be safe but figured I'd ask just to see if anyone has any experience with the combo or could enlighten me as to the pharmacokinetics behind the combo. I'm mainly interested in using Kava Kava to help me sleep after a dissociative experience. Tonight I took 3-HO-PCP and am considering a cup of kava tea to help sleep, although in the future I may be interested in it after 3-cl-pcp,3-f-pcp, MXPR, etc.
I'm also on Buprenorphine treatment, is there any danger in mixing those?