Anyone got advice for Deadly Decadence? (SDD)

So, I prefer playing Super Dark Deception, not just because of the price, but because I can see enemies coming much more easily. I have faith I can S-rank most of the levels with some trial and error if I can beat Cuphead, but Deadly Decadence, man...I doubt I can B-rank it. Anyone got some advice that might make it easier to understand how the Gold Watchers work in 2D or generally make it...possible? Also, if anyone has tips regarding Teleportation, please let me know.