Is there any way to do a bulk import of parked domains, either with or without LE SSL?
You can bulk create domains via nv command line not import though [Guide] Save time creating Nginx vhost & MySQL users and databases and Install - Quick Centmin Mod Install + Nginx Vhost Site + MySQL Database Setup and then to transfer data see Insight Guide - Centmin Mod Site Data Migration Guide Insight Guide - How To Transfer cPanel/WHM Sites To Centmin Mod LEMP Servers