Tail Rotor failure ... retard engines
There is quite a large body of the piloting community who would close the engine(s) as a first for suspected tail rotor failures, the best way to stop the torque is just to lower the lever initially. As the majority of ppruners know well the engine(s) if time and opportunity arises can be used for yaw control later. BUT closing 'throttles' first has often been fatal...
and anyway most suspected tailrotor failures aren't real failures anyway...