For Encre Noir i think you should keep Vetyver, Cashmere Wood in your mixture.
Cashmere Wood in base, Vetyver in middle. for making something similar to Encre Noir you can add Vanilla.
I think Oakmoss makes it very dark if you add it. For topnote, It's not bad if you use Rosemary instead of Cypress
I'm thinking about something like this generally:
Top: Cypress or Rosemary
Middle: Vetyver + Some floral notes(Except Violet)
Base: Cashmere Wood, Cedar Wood, Vanilla
This was what i think