What I perceived you to say in that last post is you can raise/lower the nose with cyclic while maintaining a constant nacelle angle relative to the ground and thus achieve the same angle with the fuselage as the slope?
You are correct, let's say you have a five degree nose up slope. trim the nacelles forward 5 degrees, compensate that with 5 degrees nose up to hold a stationary hover, lock the brakes, and land in that attitude.