Yeah, aya may be the only true "huasca", but I still think mimosahuasca is a pretty good colloquial term for the oh-so-common rue/mimosa brew. Fractal, if you have another catchy term to replace mimosahuasca, I will gladly propagate it.
Powdering: Crushing them first really will allow a lot more goodies to come out. There's a damn good chance that the brew may be too weak, given that whole seeds were used. Then again, it depends: how much seed WAS used per person? 5g of seeds whole may be enough, but I doubt 3g of seeds whole would.
Filtering: A t-shirt should work. I've used a women's nightshirt and a synthetic sock, both were fine. The last liquid that doesn't want to go through can be squeezed out, it's not a matter of being too thick it's that there's very little pressure towards the end of the filtration process.
Reducing: A few sips each may be difficult, just because it makes dosing correctly tricky. Some boil it down to a shot-glass' worth, so i can't see why it would cause too many problems to boil it down more, besides the dosing issue. Personally I find that downing a cup's worth ain't that difficult, you might as well skip the reduction, IMO.
Storing: Just throw it in the fridge in a bottle. If you're talking a matter of weeks, it's better to freeze it.
Given how cheap rue seeds are, I'm guessing you have more. It might be a good idea to do it again, powder the seeds first, etc. You'll be more likely to get the results you're looking for.
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