Hi
So after doing some testing it seems to me that one gets the best results for manufacturing/research worlds by having a minimum amount of farms on it (probably 0-1) with the rest factories/labs. Conversely, with money worlds it seems that the best approach is to have enough farms to NOT tank your approval completely (thereby suffering penalties) and then having markets for the rest; approval buildings don't seem to be useful for either kind of planet.
These are merely my thoughts of course, any input welcome.