Hmmmmm now it,s getting more difficult for because i dont scratch with ortofon.
I just use the pro s to beatmatch and mix my house records.(and then the parameters like above are the deal)
In your case (scratching) i should highten as low as possible before skipping over.
it all depends on your skills,....is it rough and nasty(in a positive way) you probably would raise it a little higher.
if your skills are oke but not very impressive yet, you can lower a lttle bit more .
When i used my stanton al,s for it i calibrated my arm by using nasty scratches(wild en uncontrolled).
I did rase the arm a little bit and then tried , if it skipped i raised some more until the point it didn,t skip anymore.
With my m44-7 i normaly use a hight from 1,5 to 2 (i,m no q-bert
this to give an indication