Let off the throttle when you leave the ramp/ jump, just nudge it forward or back to control its angle in the air as required.
As Megaman said, rev limiting doesnt remove the load on the motor- its the same reason why dialing down the throttle EPA isnt a terribly good idea, though thats more to do with esc efficiency (esc will run hotter at anything less than 100% throttle being used for prolonged periods).
