I would actually advise against anyone undergoing moderate mental health issues to avoid LSD, psilocybin and especially DMT (in fact, DMT should only be tackled

I would actually advise against anyone undergoing moderate mental health issues to avoid LSD, psilocybin and especially DMT (in fact, DMT should only be tackled by people with considerable experience with psychedelics and ONLY when it a good mental space, even then it can easily be a terrible and jarring experience). Instead I'd probably nudge them towards MDMA perhaps under proper medical treatment until they can work through their issues and actually get to the underlying problem (if it is in fact something that therapy can work through and not some chemical imbalance that needs treated by chemical means).