I guess I'm not smart enough to answer that question, but I sharpen at 17-20 degrees and do not use diamond sharpeners...(although)...a diamond "EZE-Lap" sharpening steel comes in the tube pouch and on my longer (4 5/8") Stanaback Special..."BUT"...it is intended for a quick and convenient touch-up method in the field & not as a steady diet.
Hope this helps,
Capt. Chris