Sky Wave
It is recommended to switch off IR2 and 3 to save battery life means these 5 mts IRs are supplied by battery then EMER gen is connected to either IR1 or IR3 if switching is used. Now when you play with IR3 and IR1does the other one goes to battery? If so then you are reducing the battery life which is some 23mts or so. If EMER GEN now packs up you are in serious trouble. What would you prefer Direct Law or Mechanical Back up. I some how cannot agree that armed with FCOM and FCTM a line pilot is smarter than Airbus Industry who have the hardware, software and all testing facilities and test pilots. Trying or making your own procedures in FBW aircraft you are asking for trouble. Frankly if anyone is avoiding direct law means he doesn't know why the aircraft goes in direct law. What else? Alternate law will mess up your landing.