if the PIC had successfully carried out just "one" of the following, full power, or gear up, or flap up, or rudder to prevent yaw, or feathered the engine the aircraft would have climbed away, this is inspite being slightly overweight.
Gazumped,
You are being ignorantly and unfairly critical of the PIC of VH-AAV, the airplane involved in the 1980 Sydney accident. You mention the accident report, perhaps you should read it - copy available
here.
The PIC had retracted the gear, feathered the left prop and flaps were fully retracted at impact; what he failed to do was go to maximum power from the company required limited power take-off setting of 700°C ITT.
So, contrary to your assertion the PIC carried out three of your "just" one" of" actions and the airplane still did not climb away.