>> Use both, and use both halves of the keyboard If you're doing a combination like Ctrl F, use the right control key. If you're doing Ctrl-l, use the left control key.

You can also remap both caps lock and enter to control when they are used in combination with other keys. If you press them alone then they can be caps lock(or escape) and enter as normal. Pretty easy to do in karabiner. No RSI issues and you never have to worry about hunting for the ctrl keys with your pinkies on the bottom of the keyboard.