villas,
In post #35 you said
Airbus does not recommend it and the reason is stick out of neutral is rate of roll demand.
All I'm asking is why you think you'd need stick out of neutral to maintain bank / wings level with side slip and why you think the rudder loads with constant side slip is enough to break it - yet it must be designed to withstand rudder loads with EFTO.
Till the A300 crashed in New York they didn't know that overuse of rudder can cause the tail to brake off did they?
You don't seem to be very confident in the loads the Airbus fin can withstand under constant rudder deflection. How will you cope with your EFTO?
Can you side slip an airliner to lose height like a small trainer?
Suggest you read
The Gimli Glider ? Damn Interesting
If the options are to do a forced landing beyond half way down a short runway, or loose some more energy on short finals - then I might try side slipping. In normal ops, side slipping is simply inefficient flight.