MECH BACKUP i.e. only ths and rudder is encountered only at ridculously high level of multiple failure eg : all comp failure-
SEC 1+2+3+ELAC1+2+FAC1+2 phew!!.
once in a while we try it on the sims freeplay.( sim is set up calm cavok ). fool around on the down wind to come to grips with the trim (tremendous amount of control lag) use rudder sparingly, wait for the secondary effect of yaw
well after a
while 
we actually landed it