Is there an easy way to remember the PNF patterns? Example: which ones help with ROM, strengthening, stability, etc.?

Unfortunately, I don’t have a smart mnemonic or easy way to remember the PNF patterns in the way you have described. PNF techniques are one of those content areas where continuous study (and practice) leads to proficiency.

Kindly check if the link ‘fun ways to remember things’ has any material that may be useful.

Here is one of Will’s related videos on ‘chop and lift patterns’. I hope it helps.

Video