Marwin has been worse than Sano at the plate this year. Sano should absolutely start in the playoffs. He just needs to be moved down in the lineup.
I'd go with something like this for game one if Donaldson and Buxton can...
I'm all in on Drew Peterson now. 6'8 versatile guard that can do a bit of everything. His video passes the eye test to me. He averaged 7.6/4.6/2.6 in 6 games versus top 100 competition last season, which is pretty close to what Willis gave us last year.