I can safely say Caapi only brews taste a whole bunch better then a caapi:chacruna brew. A WHOLE BUNCH.
Still as Olympus Mon says, reduce it down to a small shots worth, but pay attention here... Reduce it slowly!
As you are reducing, any sediment/sugars/planty nonsense whatever stay in the brew as the amount of water diminishes. If you reduce the brew too fast, these sugars can caramelize. This results in a brew with a thicker consistency then normal but more importantly, a terribly bitter taste.
A well prepared brew will flow like water.
Take your time, you will be rewarded.
“Right here and now, one quanta away, there is raging a universe of active intelligence that is transhuman, hyperdimensional, and extremely alien... What is driving religious feeling today is a wish for contact with this other universe.”
― Terence McKenna