As far as I know:
- CONF 0,1,2,3 => maintain CONF // CONF FULL => CONF 3
- The level off table has a grid for slats/flaps extended in the different configurations. You use this to troubleshoot in the present configuration. So there is still no need to accelerate.
With the troubleshooting completed you can identify the ADR that is still reliable and with that one proceed to flap retraction and navigation if deemed necessary.