I feel that MDMA is one of the most effective tools used for treating trauma and fully anticipate a time when it is common. While it carries some risks with it, these are generally smaller than those associated with pharmaceuticals. Also, it is short-acting and can be used in a clinical setting with medical support from onset through come down.
I think other psychedelics are more variable. For me, personally, psilocybin and DMT were also extremely helpful in repairing certain spiritual wounds. And there are very interesting studies in recent clinical medicine that demonstrate positive, lasting impacts of using psilocybin in those diagnosed with a terminal condition.
I'm not aware of any such studies on DMT. The only clinical work I am aware of on that substance was done by Dr. Rick Strassman two decades ago and looked specifically at physiological side effects.
A few weeks ago, it was (finally) confirmed that DMT is produced naturally in the brains of rats. This is a big deal because many have long speculated that DMT is associated with the pineal gland (aka, historically known as the 3rd eye) and may play a role in out of body and near-death experiences. If it turns out that DMT is native to human brains, as well, this might have staggering implications for our understanding of consciousness in general and might affect the ways in which we address PTSD among other conditions.
I second Indigo about MAPS. Really great organization.