I also like:
#herbstluftwm
#spectrwm
#bspwm
dmenu+picom (wherever the HW could benefit from it), a lighter browser for basic tasks and Firefox (or fork) as a backup for things like video playback, etc.
And a lot of things done in #emacs as well. That saves some resources.. I mean something like IRC, Masto, XMPP.. and some people even use it for editing 😁😁😁