Whats the best way to prepare for a powerful experience

[Ziggyzoozoo212]

As preface, I have had quite a few extremely intense experiences including an out of body+amnesia/ego death experience with weed, nitrous, amphetamine and codeine a couple of years ago, pharmahuasca while of 36mg of 2C-B, DMT aftereffects with 200ug LSD and 300ug LSD, and from none of these experiences I've ever come face to face with myself or any shadow aspects of myself, I believe this is most likely due to my lack of preperation/set/setting/everything, so I'm looking for some tips on how to best prepare for my next experience in a way that will ensure a difficult encounter with myself (planning on 300ug+175mg MDMA candyflip in a month or two).
I have someone I'm extremely close to to tripsit me who has psychadelic experience as well.

Edited January 1, 2019 by Ziggyzoozoo212