Updated: Oct 31, 2022
After gathered new ref, I found that the head sculpt was not accurate. So, I had to change big shape again.
And, I brought model into Mari. For displacement , I was using xyz texture maps. Once, I painted disp map roughly, I brough first pass of disp map to zbrush
I imported disp map and preview on to model, so I could add more wrinkles based on dispmap.