Difficulty Modifiers are an official replay system that increases challenge and reward. The safe strategy is to change one modifier at a time so you can tell whether your failure came from the build or the rule change.
What is confirmed
Steam lists Difficulty Modifiers as a way to replay stages with increased difficulty and rewards.
Why add them gradually
Cloudbreaker already asks you to solve movement, damage coverage and grid placement. Stacking unknown modifiers makes diagnosis harder.
Build check
If a modifier increases pressure, spend more grid budget on speed, knockback or Overcharge consistency before adding raw damage greed.
Boss check
Relearn telegraphs under the modified rules rather than assuming demo timings are unchanged.
Release note
Modifier names are official; exact reward multipliers still come from demo footage and are labelled as such until they are rechecked in the live build.
Build 1.0.4 (September 29): Endless never unlocks the next modifier
The September 29 notes make the rule explicit on the layer select screen: an endless dive cannot be completed, so it never unlocks the next difficulty modifier.