135-48 S mesh from Murakami (nittoku mesh) works pretty well for a base screen. It is a thin thread mesh that results in a nice open area and ink deposit.
Then go with something higher for the final white. Depends what you are looking to get. You can use another 135 but that will be a super heavy print, 180-48 S mesh will give you a nice ink deposit and a slightly smoother finish, 225-40 S mesh will give you a softer/smoother finished product but it is more expensive and will not have as much ink deposit.
In addition to your off contact and pressure, play around with squeegee durometer and angle. Those variables will matter as well.