I'd do away with primer, which I feel to be a superfluous step. Although I don't currently own a bottle, Nars Sheer Glow still reigns supreme as the best foundation of the many I've tried. I'd stick with Maybelline Instant Age Rewind concealer and Hourglass Ambient Lighting Powder in Diffused Light.
I feel my quality of life would be diminished if I could only use one blush, hence choosing two. These would be The Balm Frat Boy and Benefit Dallas. I don't screw around with bronzers, but I would want The Balm Mary Lou Manizer to highlight my face on the regular.