I used to discharge mine too and found out in discharge mode they don't run down evenly. There is no balance discharge, like there is a balance charge. So when one cell gets weak that 3.4 on one cell may be 2.8 on a weak cell. I don't even use discharge anymore. just charge/balance and storage. A lot of batteries will have a suggested C rate charge on the label. Some are capable of pretty high charge rates. I stay at 1C for older batteries. And new batteries with the 5-6c charge rate stickers I'll charge at 2c. My 6700 4s pack I'll charge at 13.4, and my 4600 shorty's I'll charge at 9.2a I never charge/discharge/charge to warm up a cell for more punch and I do just fine.

Actually with an icharger, the first cell to hit 3.0 on discharge will stop the discharge process.