Installed the package for the driver and assumed that was it :) Reboot and system fails when lightdm tries to start X it seems.
Did i miss some steps :-[
provide logs from xorg, lightdm, maybe even dmesg.
nvidia-lts is from archlinux and for archlinux's kernel, not for artix kernel. It will fail everytime , because is not compiled for artix.
Use nvidia-dkms instead:
pacman -R nvidia-lts
pacman -S nvidia-dkms
Thanks! I did consider using this package but tried the wrong one.. Fixed now.