Stu,
On our A319/20's, the Ground Spoilers activate on t/d, and stay deployed 'til retracted by the pilot after vacating the r/w.
Usually use Low or Med auto brakes for landing (but sometimes manual more practical on a long r/w and vacating at the end for example). Med tends to be used on shorter or very wet r/w's or to reduce r/w occupancy. Max is for T/O only (in case of RTO).
Autobrakes can stay in to a full stop if necessary, but usually taken out when the pilot deems suitable, eg to get off at the required exit
Rev Idle as a min is always used, but sometimes Full to ease the heat build up on the brakes if the fans on them are u/s or not fitted. Bearing in mind that autobrakes give you a set rate of deceleration, so using full rev means the autobrakes applying to a lesser degree.
If full rev used, rev idle selected at 70kts, and forward idle at around 30kts.
Hope this helps,
Rat.