On the S76, I would fly a takeoff and landing with force trim off, SAS on, Cruise and descent was FT On, and some of the modes engaged (usually HDG and ALT hold).
Stability augmentation was definitely in operation with trim off, demonstrated by turning off both autopilots and watching it try to turn itself inside out above 110kt.
Same in the 412, trim off, SAS on - unless it was night time,
when it was trim on, ATT on for takeoff and climbout.