Quoted from Boslaw:Which is the best strategy for higher scores - focus on combos and Cygnus-1, or focus on completing the various song modes? Lately I've been putting all of my effort into getting Cygnus just because it's so fun/cool but I've only cracked 1 Billion once.
I don't think there's a "one size fits all" answer to that. At the very least, it will depend on your skill level, and for the more skilled players, to some extent it's "player's choice" because of the wide range of scoring options. That said...
I believe theoretically the best strategy is to take advantage of all the various score multiplier options. Most of the modes (all? I'm not sure if I've overlooked one) give bigger payoffs for the key shots if you wind the game up first by completing more than the minimum number of qualifying shots. And of course there's the bonus multiplier, which you increase by shooting the spinner some number of times (increasing with each interval, starting with 100 and then increasing by 100 for each subsequent increment) and then hitting the inner loop shot.
But as a counter-example to that theoretical reality, consider my own experience. My highest score is only 1.4 B, and I made that score before I had spent enough time with the game to learn all the rules and practice the shots. It did include reaching The Voyage, but that only added a few hundred thousand, if I recall correctly. More to the point, in that game my primary focus was just keeping the ball in play and since then I have been trying harder now to make specific shots and work my way through all the different modes more intentionally. And my scores have been much lower, because I'm just not that good at the shots yet. I am making lots more shots than I used to because of the practice, but I feel like I'm actually getting more drains, because more often now I'll just barely miss a shot, and the return causes the ball to roll out of reach, whether out an outlane or STDM.
I'm getting better, and can more consistently score in the 200-300M range now, but I suspect that if I went back to just focusing on keeping the ball in play and starting modes as soon as I can, that at least for now I'd score even higher on average.
I'd say that if you're still working on getting better at making the specific shots at will, if your main goal is a higher score, then just getting through the modes as quickly as possible and focusing on keeping the ball in play is probably better than taking advantage of all the multiplier opportunities. The modes have much higher scoring opportunities than the base play, and often you get at least some multiplication just through the natural progression of the mode. Plus, if you can make it to the Cygnus X-1 modes, they both offer high scoring opportunities, and The Voyage isn't even that hard IMHO (Hemispheres, now that's a different story...it broke my brain when I tried it standalone; but then I haven't tried swapping my actual hands yet, so maybe that "soft cheat" is a good strategy).
I feel like The Voyage is easier to get to too, at least on my machine; three of the multiball modes just involve bashing the Time Machine, and I don't have much trouble with shots to the TM coming back down the middle. The other three are harder, but Headlong Flight is just a matter of staying alive long enough (and now it's even easier to get to), while the other two are eventually going to happen as well, if you can just keep the ball going. And since you only have to start the modes, that alone makes The Voyage much easier to get to than Hemispheres, where you have to actually complete all the record modes.
Not being a more-skilled player, I can't speak authoritatively for what the actual optimal strategy is, but I suspect that it involves setting up the multipliers as much as possible before starting modes, and getting a mode going before starting a multiball mode. Naturally, this will also include collecting as many albums as possible too, as The Weapon can significantly boost scores during modes when used judiciously (e.g. it's a great way to start out Limelight, or to finish up the third wave of Tom Sawyer).
I look forward to hearing what the actual strategy for the more-skilled players is, from those who are scoring in the 4-8B range.