We go 18/15/12 for 4/3/2.
I concur. See also the previous discussions on this point:
Less fruits with less players
2 Variants for the 2 player game
NB: The image shown below is pretty much irrelevant to the subject of this thread, but I can't help put a plug in for it. My daughter came up with the idea of taking a picture of a Finca farmer with a real fig for BGG's November "The Great Outdoors" photo contest.
A successful Fig Farmer