Lumina is a lightweight desktop environment, free of D-Bus and *kit, designed to have as few system dependencies and requirements as possible.
emerge --ask x11-wm/lumina
A configuration file is installed in /etc/luminaDesktop.conf. Lumina also has a bunch of own configuration tools.
Lumina provides its own replacement for startx to be started from console.
# https://wiki.archlinux.org/index.php/X_resources#Adding_to_xinitrc [[ -f ~/.Xresources ]] && xrdb -merge -I$HOME ~/.Xresources exec start-lumina-desktop