De Facto: why would you use the normal configuration landing distance if you have clearly a non normal.
why would you use the figures for XXXm/5kts above Vref when Boeing gives you the figures they calculated in the exact non normal configuration you are in.
And the NON-NORMAL landing distance table says those distances assume max manual braking, we use max autobrake because then the brakes will be applied sooner after touchdown and take over manually straight after.
When you have a non normal you don't have to think about brake energy, these figures are approved by the FAA and JAA so why would you use anything else?