Why didn't you just use Arch-Anywhere? https://arch-anywhere.org/

Besides, the manual installation process of Arch does not consist of that many steps; it takes but a few minutes (perhaps not the first time). To shorten it further you can write your own installation script or use extant ones, of which there are many (Arch-Anywhere being one).

I harp on Arch-Anywhere because Antergos != Arch and Arch > Antergos and other derivations.