I thinbkj your starting dose are indeed good. Now I never ingested just the powder. I think you could perform a simple water decoction, or yeh, often, the most lazy way ' like eating syrian rue seeds and nomming the wood ( mimosa rootbark powder ) will cause much higher discomfort whihc is maybenot necessary.
SOme poeple capsule syrian rue though, so you could do that ifd you really want to not cook at all and do it like a 5 YOchild could do it alone. Butmaybe simply boil 3 times one hour each run water with no acid. then filter and let decnat a bit, could maybe drop an egg white then, while warming it up and as the white egg cooks, it will bind to tannins that will make your brew lighter on the stomach too, if removed.
But if you decide to simply eat syrtian rue seeds and mimosa powder, you might never want to do anything again as some extremely fdiscomfortable experiences, often leave you in the body, meaning you do'tn even trip but are in such a pain that your mind cannot lift off. So its just like self infliging torture, whihc will still have a positive effects on possible digestive parasites lol
Why do'nt you wantot do extraction ? At least you can do brews like lets say the more old and traditional way. This will provide crude water extracts but it should be good still.
I only brewed syrian rue and ayahuasca plants ( caapi, chacruna and chaliponga ), never mimosa or acacia which I always extracted fully to n,n DMT.
Smell like tea n,n spirit !
Toke the toke, and walk the walk !