Comment by acupofnope

I did something similar. I use Karabiner and I mapped the right Option key on my external keyboard to Option+Shift (A1), and right Control key to Control+Option+Shift (A2). I've configured Aerospace such that if I want to change focus, I use `A1 + hjkl` to move the focus around, and if I want to move windows around, I use `A2 + hjkl`. I use `A1 + ui` to switch workspaces, and `A2+ui` to move windows between workspaces. For shifting focus between monitors its `A1+m,` and moving between them `A2 + m,`

By far these are the shortcuts I use most often and if there are apps with conflicting shortcuts, I change those to something else. I haven't thought about it much but I'm sure I can extend this pattern further for better ergonomics. It works great so far.