I got a bunch of Rue and a bunch of Caapi leaves. I want to try smoking Rue alks but I hear and could imagine how bad smoking seeds could be. I enjoy smoking Caapi though and have experience making 10x concentrates of Caapi.

So, is it possible and a good idea to boil up some Rue tea and then evaporate it onto some Caapi leaf? Any clue on how much rue people tend to smoke in MGs? I'd think a gram of smoked seeds would be dangerous...

I have done this. It works as expected. Works well on passion flower leaf too.

Smoking seeds is not extremely dangerous. It's just foul. The seeds may pop when burning, which is an annoying complication.

If you want to smoke rue extract, don't use the plain watery extract, but prepare the freebase form. It is much better for smoking. Read about some of the rue extraction teks on the nexus wiki. Also there's a wealth of information on changa on the forum. Changa is dmt and harmala infused onto herbs.