My advice is xfce (4.12) with lightdm.
U can search for true package names from here:
I'm not remember all steps. But i can write some about them
#U need add user with this. Add user with your selected username(change "username" include), select password.
useradd -m -g users -G stroage,power,wheel -s /bin/bash "username"
# u need use "pacman -S " with list ( sample pacman -S xfce4 )
xorg-twm xorg-xclock xterm
# May be i'm not totaly true for this list. There is can be mistake.
# After reboot u can select xfce from lighdm login menu.
# If u need need sudo command for terminal ( Write for login: root, for password: root, after su command )
sudo leafpad /etc/sudoers
# Add/change there. Use your login name for yourusername
root ALL=(ALL) ALL
yourusername ALL=(ALL) ALL
I cant using enough English language. My writings can be wrong grammer.$
"in micro$oft we not trust"