I can't find any explanation on: install Artix as the next OS installation
After striving very hard to learn boot technique finally I have strongly believe it is about the separation of boot for efi and the internal boot component of Artix itself; this is what i clearly find in the result of MX linux installation (perfectly finish job of dual boot installation side by side Windows). It has separate efi ie. ESP which is named/mounted as /boot/efi while keeping MX stuffs itself in /boot of the same / root partition
How exactly to do it the definitive way ?
I can't understand what exactly you want to achieve. Please, tell us at least which ISO you are trying to install.