RVDT, think you miss the point...if both engines/transmission fail,both your hands /feet should be occupied in flying the aircraft,and sustaining RRPM..nothing else matters..except your life..!
This was not a set-up in a Sim,or a practice from 2000` into wind on a fine day,having briefed...
As I said in an earlier post any emergency `switching` should be in easy reach of your hands,ie floats,or clear/dump weapons;in this case your lights and rad .alt should be on the `Essential busbar`....