I posted about that in here User Poll - XFCE vs KDE - KDE Deprecation Considered!
Enlightenment has a lot of very special stuff EFL, ESD etc. I don’t really think it’s that much better on memory either. Yes that’s from 2014 but I doubt it uses less now than it did back then. A more current benchtest. It’s actually really hard to find any tests for Enlightenment because it’s not very popular (ie very few distributions have media that includes it.)
You are going to have problems with it you won’t have with XFCE due to the specialized nature of it.
I think XFCE makes more sense as ‘complete package’. It also helps that it doesn’t have releases all the time either. I think XFCE is also a better option as it’s officially supported by Debian’s live-cd project whereas Enlightenment is not. I also don’t think Cinnamon is nearly stable enough having tried that.
I don’t really see the usecase for Enlightenment. You’d be better off doing a variant of Whonix Workstation that JUST includes a cut down window manager and Tor browser. That is something that would benefit people who use multiple Whonix Workstatations for different contexts. It would also have very minimal depedency (being just above a console-only version of Whonix).
This would be the go-to option for advanced users without too much effort. Personally I’d pick i3 because it’s well maintained and does have a active future Sway, when the time comes that we all use Wayland it will be easy to transition.
Whatever you pick for that I’d go for something that uses has a ‘brother’ that uses wlroots. Eg if you wanted awesomewm because there’s Way-cooler for that time when it will need to be transitioned away from X11.