1. apt-get install gufw xterm lxappearance lxrandr lxpolkit openbox obconf obmenu openbox-menu menu tint2 nitrogen featherpad vlc audacious \
  2. ceni alsa-utils alsa-tools-gui slim pcmanfm chromium lxqt-sudo orage sylpheed sylpheed-i18n sylpheed-plugins hexchat zenity xautolock
  3. apt-get install xserver-xorg-core xserver-xorg-input-libinput xserver-xorg-input-kbd xserver-xorg-input-mouse xserver-xorg-input-evdev \
  4. cinnabar-icon-theme desktop-base base-files

not sure about the fluxbox/openbox, but they are very low resources indeed, fluxbox seems more atractive, but openbox, has very easy way to create menus tough..