Usually need 60-80 amps to perform this. Its usually only pros trying to drop a couple ohms because of the 2s limit. My protek 6100's are all under 8 ohms. When they get to 15 ohm I give them away. Those guys will try to get that 8 down to 3-5. I don't do it for a living and won't risk try...
Full charge, cut off at 3.3. Then storage mode to 3.8 per cell when done. Or if your happy with the run times, full charge and cut off at 3.8. Then when it shuts off you’re already at storage voltage. I set my crawlers up like that.