When installing Linux Mint, you can install with ZFS Root by following standard instructions. However, there is an issue with almost all Linux distributions default ZFS install script where the allocated spaces for the partitions are a bit too small for real world ZFS Use.
These instructions show how to alter the ZFS setup script to have a more appropriate partition spacing.
Boot into the Linux Mint OS USB stick, and:
sudo su cd /usr/share/ubiquity/ cp ./zsys-setup ./zsys-setup_orig vi zsys-setup