If you are using sublime quite a bit, it may be much more efficient to skip actions (the open with action) altogether, and instead, create a workflow with a file filter wired into "Open" and set the open with app to be Sublime. This way, you could just type e.g.
sub filename
... and you'll see only the file types you want, pressing return will open in sublime.
Let me know if you need any help with this
Cheers,
Andrew