Figure out what gear you are most likely to ride on the flats. If that falls on the middle chainring and in the middle of the cassette, I think you are better off. That way you can shift with only your rear derailleur on mild rolling hills without hitting cross-over gears and shifting your front derailleur constantly (which required an almost-simultaneous shift of the rear derailleur to make a small gearing step).
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72