I've had some good scores without doing well in CIU modes. Not really sure how but I find the Seek and Destroy and Blackened can really get you a lot of points. Regular multiballs not so much other than coffin multiball. If you can get coffin multiball going and bring in another multiball then that can pay off pretty well.
However, nothing will get you points like cashing out a great CIU bonus with 2x. For Whom the Bell Tolls is the best mode for points. Finish that mode and you get a nice bonus on top of all the points you get in the mode. Cash out with 2x and you will have well over 200m just from that. Frustrating thing is that you can have a great game, get to a CIU mode, and then drain right away. Man that sucks.
I can hit the fuel shot fairly regularly. It's a shot right off the edge of the right flipper. The mystery scoop is a hard shot for me. It seems like the ball falls into there accidentally multiple times in a game but I have trouble getting that shot when I need it.