What shortcut to use on a full size Mac keyboard?

Love the app, but as I’m typically using my MacBook with my beautiful 43 inch monitor and external keyboard (Apple) that doesn’t have the “fn” key it has been difficult to find a good setup.

As a developer, I use many key combinations for use with my IDEs and currently I use Flow with Ctrl+Shift. However, as you can imagine, this is problematic because this is a common combination to go back when tabbing (ctrl+Shift+Tab).

This might be a dealbreaker for me when this goes paid… Anyone has a good solution for full size Mac keyboard? Or anything planned to address it somehow (to be honest, I don't really have any good ideas).

Oh, how I wish Apple would include the Fn key in its full-size keyboard!

Thanks for your help!