I know my Blinkie discharges around 0.3amps...
If it were me I would aim for 0.02v cell imbalance or less.
I've seen my own junk packs with 0.02v difference after a run, & that's no problem recharging.
You could likely go higher, but with out testing & monitoring I couldn't tell you how much.
This little guy is quite handy...
http://www.hobbycity.com/hobbycity/s...rger_System_6S
I see they replaced it with their own...
http://www.hobbycity.com/hobbycity/s...edic_System_6S
other than having to push "balance" on startup every time, my MKS works great.