You'll never pull that many amps in flight. Those peak currents are what the servo will draw when it is stalled, which will not happen in flight unless you've chosen servos that aren't strong enough for the application. At most, you might stall one servo for a few seconds, likely the rudder servo in a hard maneuver. I'd be really surprised to see you go over 3 amps in normal flight, maybe 6 amps for half a second if you decide to do a snap roll or flatten out a spin.