Looks like this was overlooked, probably because it can be found out with a bit of reading: a typical dose of Syrian rue seeds is around 3.5g so you have near enough 3 doses of rue. If your MHRB is good you might want to use only half of it - at least if you brew it all, split it into two doses and take the second half (or half of it, even) if the first dose is too weak.
The simmering time is largely independent of the amount of material involved. With smaller amounts, though, you have to pay closer attention that the pan doesn't boil dry.
Have you tried it yet? It's been a month or so now.