Tactical aspect of the game very important. Run game crucial (for e.g Ravens run defence were a brick wall just now against Texans) You have to have a plan fit for purpose. no arguments there.
but you have to heart for the battle as well. The Cowboys are feeble when it comes to ticker. as soon the game isn't going their way, they fold. It's been happening for years. And McCarthy won't change it at this stage.
P.S. are you feeling confident? Rolling the powder puff cowboys is one thing, shutting down Purdy and co is another thing entirely. I can't see anything other than 49ers win here.