Its probably been said before in the last 55 pages but,
If you lose sensible airspeed and altimeter indications, disregard all and fly attitude and zero bank angle for normal cruise flight with relevant manual throttle setting. Been there, done that.
Try it in the sim.
Does that work if you start in the stalled condition with high rate of descent and 40 degree AOA? Will it accelerate out of the stall at cruise throttle?