We reccomend 6 amps with .02 peak detect for the entire pack.
Discharge the pack down at 30/35 amps after your run down to .90v per cell then leave them alone until the next time you use them. Before you go to charge them you should put them on a discharge tray such as the Integy 0-30 for 1-2 minutes and then start charging them.
For long term storage 3 weeks or more put 500 seconds of charge back into the pack.
Hope this helps.