discharge to 5.4v Volts is correct however that is only on a discharge tray.
if you are to discharge a pack in series (i.e using a regular charger) you should cut off the voltage at 6Volts, and then use a tray (smart tray, exceed or lightning teamwave)
when you set your charger to cut off at 5.4v it is 0.9v per cell average
, some cells above and some below 0.9v, this not good. not only does it take some cells to below 0.9volts, it also pretty much renders your equlizing tray useless if you have cut off at 0.9 coz some cells would of already been discharge to below 0.9v.
just some common sence that doesnt seem too common