[davidhollander]

I have found cascading to be an unhappy medium in the past. In awesome-wm, I'll tap [Win+Space] to toggle between 100% overlapped (fullscreen with unoccluded task bar) and 0% overlapped (multi-column horizontal). [Win+J] and [Win+K] cycle windows. [Win+H] and [Win+L] resize the width of the primary column in a multicolumn layout.

So let's say I have a terminal window with VIM, and a web browser with a tutorial or documentation open up to the left of it. I quickly need to scroll the web page down to continue the example, BUT the VIM window is currently focused. Assuming the web browser can be scrolled using [J] and [K], I'll simply tap [Win-K, J, Win-J] to accomplish this task while avoiding modifying the layout or leaving the home row to use a pointing device. If I don't actually need to display multiple columns at the same time, I just press the change layout key to stop using a multicolumn layout.

So as a VIM user I've been very happy with this setup in awesome-wm for the past 2+ years, but if you wish to recommend an alternative I will definitely give it an install.

edit: I was able to write a new layout function for awesome-wm which implements diagonal cascading in the manner you described and retains my keybindings. I definitely agree that cascading makes it bluntly obvious which window is the currently focused one. I'll have to play around with it more.