Stop moving your hand every time you need to use arrow keys:
- Your right point finger is already on the J key
- Press and hold a hyper key (right Command pressed with a thumb, just like a space key - in my config)
- Use IJKL like arrow keys
Additional features:
- Home/End navigation: Hyper + U/O moves cursor to start/end of line
- Page navigation: Hyper + Y/H for Page Up/Down