To all:
I'm presently on hols and away from my FCTM, my understanding has always been per Mr Boeing:
- as the 737 is often the first jet upgrade for a turboprop operator use the KISS principle, everything auto or everything manual as the ARM feature CAN be confusing;
- if you have had proper training and have proper understanding then use ARM as desired and if for some reason (winds, other factors) the ARM mode is not acting correctly then disconnect the A/T...as you would any other system that is not performing correctly.
I am not aware of anything in the FCTM that is more specific to different phases of flight, if I have overlooked or misunderstood something then my bad.
Cheers
Galdian.