This is based on information from Ancient DOS Games #130 - Epic Pinball

Super Android - Normal
Pot of Gold - Low
Excalibur - High
Crash and Burn - High
Magic - Normal or High
Jungle Pinball - Any/Your Preference
Deep Sea - Low
Enigma - Any/Your Preference
Cyborgirl - Normal/Any/Your Preference
Pangea - Low
Space Journey - Low
Toy Factory - Any/Your Preference

I'm not sure what the best would be for African Safari as it's not covered in the video, I'll have a play and edit the post to include my thoughts later. What are people's thoughts on this? Any that you would recommend changing?