Is there a particular N1 or Nr setting that one looks for during the shutdown sequence?
Maintain 77% Nr (Cyclic centre light out) using recommended 70%/70% N1 during the 1 minute cool down period prior to idle stop release and engine shut down.
Re Shawn's comment - after start I personally recommend that you wait until you have accelerated to at least 65 - 70% N1 on your way to 82% min after releasing starter prior to lowering the collective (if the elastomerics have had enough time to cause it to raise) which avoids the clunk clunk that you will experience if the hydraulics have not achieved full working pressure.
Trog