Just wanted to bring this to people's attention as it is an option that many of you might not know about. I hope to find ways to improve the experience through discussions.
I believe you will need dgvoodoo to keep the game from crashing as in my experience anything having to do with a windows login or lock has forcefully ended ffxi.
Using this application intended to play arcade emulators remotely with friends you can play ffxi on a remote machine complete with controller pass through if you desire.
https://parsec.app/
If you have an nvidia card and a lot more patience you can also try moonlight which is supposed to use the shield streamer service. Which may produce way better results.
https://moonlight-stream.org/
Both of these apps can be used from another machine, hacked switch, android phone/device. I am unsure at this time of the availability on IOS