Since D scoring apparently is not based on shutouts I look at which teams make the most splash plays (TOs & sacks) and compare to how many the opponent gives up.DST, pick 1 (scoring is based only on sacks, turnovers, blocks, and DST TDs)
Dal vs NYG
KC vs LAR
Kickers, pick 1
Folk vs Min
McPherson vs Ten
Myers vs LV
(yes, I stocked up on DST and K to block opponents in need this week)
The Cowboys have 42 sacks (32 for KC) and 16 turnovers forced (10 for KC).
The Rams have given up 35 sacks (30 for NYG) and 15 turnovers (11 for the Giants).
By my math that gives a slight edge to the Cowboys (+7). The Giants will also be without Evan Neal (been out the last three games) and Jon Feliciano (10 game starter) and also their swing tackle Josh Eznuda.
Defenses are random number generators but since you have to make the decision by Thursday, before we know the status of Stafford, Dallas seems like the better option.
For the kicker, also random number generators, I typically try to choose a guy from a team I think will win their game. In my book Myers has the best shot, he is also averaging the most PPG.