I still think setting the attitude to what it was at FL350 and doing what the autopilot was at about 2.5 degrees nose up attitude and maintaining cruise power around 90 percent N1 or what ever your cruise power is with your conditions would be prefered to busting through altitudes because of a bad checklist. If the altimiters work, use them. Just get out the unusable airspeed checklist and don't repeat this error again. The 5 degrees nose up and climb power is still taught in some airlines. Pray for the airliners above them opposite direction. That procedure is only to be used in an emergency when control of aircraft was in doubt, not loss of airspeed.