Instead of mint, if you are doing a new install and looking for a minimalist approach with i3, consider wattOS distro microwatt edition.
I found it on distrowatch; I installed it about 6 months ago on an old laptop and I'm pretty happy with it.
I found it on distrowatch; I installed it about 6 months ago on an old laptop and I'm pretty happy with it.
http://planetwatt.com/new/index.php/about/
"wattOS is a lightweight Linux operating system remastered from the core Ubuntu Linux build."