So I don’t forget it again…
… gosh, I always forget what I do to my font configs on my machines.
KDE: Enable Antialiasing/Subpixel hinting RGB/Style Medium
Fontconfig system wide: Replace Helvetica with something readable in .fonts.conf
Link 10-autohint.conf and 10-sub-pixel-rgb.conf
To be never forgotten again for my fonts to look gorgeous.