look at my build thread linked below
https://rennlist.com/forums/964-forum/904951-my-964-c2-transformation-build-thread.html
On the 964 monoballs and solid suspension components do not contribute to harshness as much as poor shock setup damping and calibration.
I've driven 964 that feel much less supple and controlled than my car that have full rubber bushings
the goal here depends your objectives.
I do not like Bilstein shocks on the 964. Never driven one or in one that didn't feel harsh and overly damped.