If you're struggling with scores... Although I finally cleared 200,000,000 - I have nearly 750 of my own plays on this game now. And I still finished with under 750,000 just yesterday in a game. Rebounded with a 127,000,000 or so score. This game is a masterpiece design and code wise. Don't let low scores discourage you.
If you want to try and get a bigger score, here's my best advice for the easiest approach. Skip album modes completely, they're just not worth it points wise yet. Try to at least get Fender, Duff, Vader, Gun and Rose patches while also trying to get a few balls locked and also try to get some good boosters in. Then play Welcome to the Jungle. I can't think of an easier way to score big points with the least amount of effort.
If you can't hardly get anything before starting a song, then It's So Easy seems like a good choice since it's a frenzy so scoring can be a little better even without boosters and patches.
Study the patch list and what they award. That's how I determined what I thought was most important for me, based on how I'm playing the game and what my goal currently is (highest score possible). I'm sure I'll completely change my patch strategy when I decide I want to go for Not in this Lifetime.
If you go into a song with 70 or lower song level, you're going to struggle with a huge jackpot, especially without certain patches. So in these situations, it's usually best to cash out early - especially if an extra ball is offered. Then work on those boosters, ball locks, and patches some more.
Last but not least - I can't count how many games I've gone all the way to ball 3 and didn't even get to start a song. I've thrown away many games just trying to get setup with the right patches, some good booster action, and locking balls. Recent higher scores I'm getting, I still focus on those things and sometimes still don't get to start the song till ball 3 anyway but it's so worth it when I pull it all off.