What really made the game for me was reading up on feeder modes. Some of the early modes increase your mode bonus in later modes, so I plan which modes I want to play and in what order. Also make sure to hit plenty of orbit shots since advancing the map also increases your mode bonuses.
As far as there being too many multi balls, I increased the difficulty on beast hurryups by one, so they’re not all lit at the start of the game, which I feel really makes a big difference.