Can you tell what your motivation is? KDE Plasma fulfills these requirements. Do you just want to try something more lightweight? Do you want a tiling window manager?
I want an automated Window manager that is light. KWin rules dont work that well for me, as I get tons of dialog windows in fullscreen.
More lightweight. Plasma is a dependency mess, I opened a Goal to make this less bad, and I am experimenting with a minimal, Qt6 and Wayland only install
Automatable (configuration-less) is indispensable. I got used to it with bspwm, and after using that for a while, switched to herbstluftwm and realized I'm stuck. I don't think I can go back to a WM with a configuration file anymore. Even the different between i3 and fully config-less like hlwm is stark once you're on the other side.
Alright, well, I haven't looked into the Wayland tiling window managers yet, so I can't say, if there's maybe something that fits exactly right, but anyways.
KWin rules dont work that well for me, as I get tons of dialog windows in fullscreen.
You should be able to customize the rule to fix that. In the property "Window types", deselect "Dialog Window" (or frankly probably everything except "Normal Window").
It integrates various things from KDE and the KDE apps should feel at home there, while they're also pursuing the goal of using few resources.
I don't know how that impacts which dependencies are being used, but there probably is an impact.
LXQt kind of lets you choose what window manager you want to use inside of it. See "Which compositor is used?" and following questions in the link above.
I don't believe, it comes with a NightLight feature out if the box, but there's probably sone standalone application for that.
And well, whether its app menu is good, that's certainly a matter of taste. It's definitely serviceable, as far as I remember, but it doesn't have the amazing search of Plasma, for example.
Is Krohnkite available for Plasma 6? My understanding is that Kwin Scripts need to be updated, or at least re-uploaded, as Plasma-6-compatible. Presumably that's not the case for Krohnkite, since it's been unmaintained for a while...?