From what I understand from your post, it sounds like you're trying to induce an endogenous DMT trip through dreaming. You may want to reference the
FAQ about this, as there is no proof that DMT is even involved with dreaming in humans. I've never heard of anyone being able to accomplish this voluntarily, and I doubt that it is possible. However, it sounds like a neat experiment to try, assuming that you've made sure there aren't any contraindications against the combination of supplements you'd be using. But if you're just looking to experience an altered state of consciousness, you'll have better luck with meditation, lucid dreaming, or other psychedelics you can obtain legally.