In radar app, I don't use phrase "Report loc(ILS) est", because I "see" a/c and its movement , so once it is on ILS and stabilized :" Contact TWR at..."
In PROC , after LOC(ILS) est,Report OM, or " Clear to land" , depends on current situation.
I know that some so called experts and instructors will say that it is not enough,but for me it is OK because different pilots from different companies, at different airports, never complain about.