At my company, all landings should be conf3. With the exception off landings on wet or contaminated runways or short runways (1800m or less), in this cases we use conf full.
About autobrake, well again, on wet, short or contaminated runways, autobrake MED should be used. In other cases you can also use the Low setting, depending on the location of the taxiway you would prefer to use to vacate. In any case, the use of autobrake is recomendet.
We use idle reverse only on both sides on long and dry runways if everything is working normaly. No reverse at all is not recomendet.
Conf3 approaches burn less fuel and idle reverse on landing reduces engine maintenaince costs as well as fuel costs. We fly airbus narrowbodys.