Arksarius

Just install ComfyUI locally, use their AMD Linux install guide, then install the Models and Extensions that KritaAI needs, as mentioned on their github. This way you can easily use the full Comfy, which is what KritaAI installs an the backend, and just select local Server in the KritaAI options to usw your local install. Works perfectly well on my Arch system with a 6800XT.

Manjaro is Arch in a trenchcoat and on crutches lagging two weeks behind with its packages. Holding them back doesnt provide any additional stability and on the contrary has repeatedly caused conflicts. They simply dont have the capacity to check all the packages so its pretty much useless to prevent timely updates. The only difference between then is that manjaro has a few more preinstalled Apps and pamac. And EndeavourOS covers that, its a kind of Arch for beginners, easy install, and lots of Software preinstallable.

I cant really understand how people are still recommending Manjaro, just get Arch pure or EndeavourOS. Its more up to date and has fewer package conflicts and inconsistencies because they arent arbitrarily held back. Also doesnt ddos aur. It even has a guided graphical installer. Additionally if you need some GUI to manage your packages then just install pamac to get the same one as in manjaro or use pacseek.