When I was an instrument student, I made up an approach to an airport
that did not have any approaches. It was a circle to land. I even made
an approach plate on the same size paper as the govt charts and put
every little number and detail on it. It was an interesting exercise. I
then went out and flew it (in VFR conditions), and flew the missed.

I see no reason to use it for currency, might as well use a real
approach as these familiarize you with an approach you might use in IMC
someday. Familiar approaches are easier for me to fly.