Soem time ago, a batt guru from Trinity talked about rx pacs and according to him, you don't want to chanreg them at more than 1amp. Yes, you can charge them at their 1C charge rate (capacity/1000), but you are training them so to speak to dump rather than power the electronics for a long period at modest amp draws. You'll get better pac life charging at the lower rate as well.

I don't discharge mine every time, I average every 3rd or 4th time. I use 0.5amp as a discharge rate as well.