Well... don't stress about a few percentage of lost production. It probably won't kill you.
For all large and huge breatheable planets, go ahead and add lower level Robotoids, if the planets are specialized (eg: they have lots of research labs, or lots of resource buildings, whatever). 10 or more guarantees that any Robotoid will be effective (well, you need an 11th basic facility before the Robotoid I will actually have an effect, but it is equal to the 11th, and will be upgraded later). They can be upgraded later with the "Upgrade [all] Facilities" button in the construction minister window (with all the SYs in the empire listed).