Did the BUSS, quite easy to fly actually. At high altitude we immediatly initiated descent using unreliable airspeed procedure which is basically thrust idle, pitch at around 0 degrees. Once at lower levels, BUSS becomes more stable and reliable. Not all simulators have BUSS installed just like the ac. We activated BUSS as described by Airbus.
EFATO/approach/go around are mandatory items on every check, so obviously you have to do them every time. In my airline the abnormals/emergencies are picked by looking at incidents/accidents on the A320. Unreliable airspeed was quite an important item, just like high altitude jet upset recovery.