Interesting. Because resting my left hand on the keyboard my pinky is on shift, ring on a, middle on e, index on f.
I also use tmux. I do a remapping to ctrl-s because I use ctrl-a (and ctrl-e) all the time to go to the beginning and end of lines. And let's be real, the normal behavior of ctrl-s (suspending) is not something I'm ever going to use on purpose.
But also I'm not using a mac.
> I hate having to press both keys with one hand for Ctrl key combos (ctrl-a being the only exception).
Do you not use panes? In vim? Because I use those quite a lot.
My little finger is much shorter than the rest but moving it a few mm to the left is easier than a large jump to the bottom of the keyboard for me.
For example, I use tmux a lot with ctrl-a.
A small movement of the hand left, jumping my little finger onto control (caps) and using my ring finger on A works really well for me.
Btw the first thing I do on getting a new mac is map the right alt key (or enter key back in the day) to control.
I hate having to press both keys with one hand for Ctrl key combos (ctrl-a being the only exception).