Why do folks make this so hard?
Give it all the advance your particular combo can handle without bucking on the starter to fire and idle good! Now you have initial!
Every combo needs something a bit different!
Check it with a light and tape and such if needed and record.
Next get a total with your light and tape for at whatever RPM it takes to get it there. Record it!
lastly limit your dizzy for such to 34/38.