I did some current testing, and here is what I have mine set to:
X, Y, and extruder are set to 730
Z is set to 850 (based on the dual Z motors)
After 30 Minutes, I am able to keep my finger on the motor. Measuring it shows about 45C, well below the max of 80-100C
Never set this blindly though… Check often on your first print.
Thanks Steve