I'm not sure when Arians is going to get his due, of being a perhaps top 3 coach, but definitely a top 5 coach?
Even with Stanton they kicked the Niners ass last year. They are probably the best second half team in the NFL, they have an aggressive, opportunistic defense, and a great passing attack.
If you want to play to Niners strengths, do what the Vikings do: play dink and dunk and don't challenge them deep the entire game. If you want to kill the Niners take some calculated shots downfield, and that will open up EVERYTHING. Also, do you think the Cards will be scared by Boldin and T Smith into NOT blitzing Kaep ALL day? I think not!