[Feature Request] Key bindings to tile last window with current window

I think this should be a feature in all window managers but I haven't seen it.

1. Key binding to tile last focused window with current focused window (fake tiling or whatever)
2. Another key binding to switch the two windows around.

Maybe they could be the same binding. If last window is already tiled next to it. Switch them around. Maybe that could work?

Maybe one for tiling left/right, another for top/bottom of screen. Not sure about big screens, could be useless depending on what size screen you use.