A compatibility for exporting to Exorsus Raid Tools would be extremely valuable! I did some research to assess the feasibility, that you may find helpful.

First, the use of LibDeflate is necessary for the export string. Some digging uncovered atleast one node package:

https://github.com/djytw/libdeflate-js

Additionally is the format in which the export string should be in. Here is an example project that uses a CSV, but exemplifies the expected string format pre-compression:

https://github.com/baoist/ertgroups

Hopefully this helps.

Personally managing groups is a very time-consuming part of the raid. Being able to automatically do groups (and move sits to group 7-8) would be a massive timesaver and we wouldn't hesitate to jump on board with the raid attendance feature of WoWAudit with this improvement.

I took a look at ERT and it looks like the raid groups import feature doesn't support realm names, which makes it conflict with the main functionality of the invite string which is inviting people.