1.0 Introduction
Arch is a slightly awkward distro to document because it starts off as a very minimal operating system and is thereafter highly customised by each user, resulting in a platform that is quite possibly unique -with a unique bunch of 'issues' and 'quirks' that might mean that anything I describe below might not actually apply to you or work as intended!
Accordingly, this document starts with a disclaimer: I'm running Gnome-on-Arch, installed according to the instructions I give in an older article. I am reasonably confident that the Niente Version 4 installation will work fine on any Arch platform that follows those sorts of installation instructions ...but obviously cannot guarantee it!
As with all these installation articles, I assume a fresh, default installation of the underlying operating system, tweaked as per that older article to pre-install nano, sudo, wget, bc and so on.