I've finally been making decent progress on Normal -- I'm getting into C5 consistently now, though C4 is still a trainwreck (despite leaving it with 5 lives on this run).
All in all, the final boss doesn't seem that bad, and even the survival mid-boss is straightforward (aside from those stupid rotating lasers, anyway), but Violet's fourth attack has me wondering -- I've figured out that when the small lasers appear, that's the prelude to the huge screen-filling one, but is the only solution (which doesn't happen in this run) to bomb and get out of the way before the invincibility wears off?