First of all, ayahuasca has necessarily caapi or another harmalas vine, with the addition or not of some tryptamine admixture. So Generally it is Caapi vines and chacruna leaves or chaliponga leaves instead of chacruna but always caapi.
IF you brew syrian rue as harmalas source and do'nt use caapi, you haven't what we call "ayahuasca". So Syrian rue and acacia ( do you sue confusa rootbar ?), you may want to call it " anahuasca" or Haoma ( for "ayahuasca analog "
.
That was for the semantic part. I know that sound like grammar nazi, but let's call a cat a cat, and a dog, a dog, although both are carnivorous pets.
Now you want to let the plant sit for a week, in rooom temp or warming up, like light simmer ? This is unclear, although cooking up one week seems overkill to me. I guess you mean room temp.
DO you plan on using any acid such as ascorbic or citric acid ? Think about the pH of water, especially if doing room temp and depending on water used.
Smell like tea n,n spirit !
Toke the toke, and walk the walk !