I respond in your other brother thread about dosage rue/caapi extract (it's down to purity but consider 1/4 weaker the caapi extract or even 1/3)
As for the equivalence, it depends as oral DMT vary a lot between individual and extract itself.
I used sometimes 100mg fumarate and 150mg rue extract with little effects similar to 2 grams cubes, while sometimes 75 mg of another extract similar to 3 grams cubes (as similar can be).
Some poeple only need 50 mg dmt fum to get the full explosive effect and I never got that with oral. Although on vaped DMT it seemed more standard like 50 mg with good vaping technik should be enough to get you there.
Smell like tea n,n spirit !
Toke the toke, and walk the walk !