Like she said.. Someone did once suggest Ilford RC MG was 6- 10 to me, although being a ''The right exposure is the one that works'' type guy I do rely on trial and error.
Another trick is to watch the temperature of the soup. And if an area of the print is not quite coming up, sometimes I dip that portion in a tray of hot water, rub, dip, rub, and continue developing. It sounds rough, but I have used that to save an otherwise good neg/ print.