With the network installation script, one can configure their texlive distribution to be as minimal ~40-60 MBytes. I wasn't exactly sure which packages I needed but I ended up with something like 120MBytes of on-disk footprint. Additionally, a package manager called 'tlmgr' is installed that can help the user install additional packages on the fly as needed. The entire procedure was quite simple.
It's completely outside of CRUX's management at this time, and I have no plans to make a Pkgfile. The network install script presents a textual menu that can be used for choosing which options should be included, and there is nothing like this, as far as I am aware, packaged for CRUX. That's good enough for me because it's not the only non-managed software I have installed - it all just lives in /usr/local and doesn't clutter up my system much.